These full featured OEM length up pipes are an excellent value! These are brand new and include all the high flow, high quality features your looking for at half of new GM LB7 up-pipes.

DHD has taken OEM replacement to a new level. This stock replacement up pipe set allows 53% greater flow than stock and is a direct bolt-on to your factory manifolds. Unlike factory parts, our up pipe is manufactured from 11 gauge 304 stainless steel and includes DHD's HD 304 stainless steel, internally-sleeved bellow that can take the abuse of high temperature and high pressures. Each up pipe outweighs the competition by nearly a pound and features internal and external flange TIG welds!

Features:

• Inner and Outer TIG welded Steel Flanges (Not cast like competitor)
• Stainless steel 11-gauge .120-inch wall, 2-inch OD Up-Pipe
• Direct bolt-on replacement to factory exhaust manifolds 
• Significant reduction in exhaust back-pressure
• Lower exhaust temperatures 
• Free-flowing stainless steel inner liner bellows

Kit Includes:

• Stainless Multi-layer Up Pipe Gaskets (2 Upper, 2 Lower)
• (12) 12PT Coated M10 12.9 Up-Pipe Bolts

Applications: 

• 2001-2004 LB7 GM 6.6L Duramax 2500HD/3500HD

Compare to:

• PPE 116120000

These full featured OEM fit up pipes are an excellent value! These are brand new and include all the high flow, high quality features your looking for at half of a new GM LB7 up-pipe price.

DHD has taken OEM replacement to a new level. This stock replacement up pipe allow 53% greater flow than stock and is a direct bolt-on to your factory manifolds. Unlike factory parts, our up pipe is manufactured from 11 gauge 304 stainless steel and includes DHD's HD 304 stainless steel, internally-sleeved bellow that can take the abuse of high temperature and high pressures. Our up pipe outweigh the competition by nearly a pound and features internal and external flange TIG welds!

Features:

• Inner and Outer TIG welded Steel Flanges (Not cast like competitor)
• Stainless steel 11-gauge .120-inch wall, 2-inch OD Up-Pipe
• Direct bolt-on replacement to passenger side factory exhaust manifold  
• Significant reduction in exhaust back-pressure
• Lower exhaust temperatures 
• Free-flowing stainless steel inner liner bellows

Kit Includes:

• Stainless Multi-layer Up Pipe Gaskets (1 Upper, 1 Lower)
• (6) 12PT Coated M10 12.9 Up-Pipe Bolts

Applications: 

• 2001-2004 LB7 GM 6.6L Duramax 2500HD/3500HD

Compare to:

• PPE 116120010

* Note: LEGAL IN CALIFORNIA ONLY FOR RACING VEHICLES THAT MAY NEVER BE USED, OR REGISTERED OR LICENSED FOR HIGHWAY OR OFF-ROAD USE.

Features:

DHD's modified up-pipe is pre drilled and taped for aftermarket monitoring devices. These pipes serve as excellent replacements for your leaking LB7 up pipe. All up-pipes are thermal coated for corrosion resistance and come with a 1/8" NPT bung that can be used for EGT or drive pressure monitoring. This product retains OEM attachment bracket location which eliminates the need for further modifications. 

For a leak free and trouble free install, pair your up pipe with DHD 300-112 Large Flange Up Pipe Bolts and DHD Multi-Layer Gaskets.

Fitment:

Passenger Side - 2001+ LB7

Features:

We here at DHD offer a modified up-pipe that is pre drilled and taped for aftermarket monitoring devices. All up-pipes are thermal coated for corrosion resistance and come with a 1/8" NPT bug that can be used for EGT or drive pressure monitoring.This product retains OEM attachment bracket location which eliminates the need for further modifications. We offer a driver side and passenger side up-pipe so please verify that pipe needed before placing order.

For a leak free trouble free install, pair this pipe with out DHD 300-112 Large Flange up pipe bolts and DHD Multi-Layer Gaskets.

Fitment:

Drivers Side - 2001-2010

Keywords: up pipe, uppipe, up pipes

You've asked and DHD has delivered:

The perfect addition to any exhaust manifold replacement or upgrade on your Duramax. Our phosphate & oil coated bolts meet or exceed OE specs. Paired with the bolts are 16 Stainless Steel ARP Washers for the perfect torque and corrosion resistance. This kit is extremely popular with the techs in our shop. No more reusing or wire brushing rusty scaly hardware.

This kit will do both sides of the engine and replace the OE studs. 

Fitment:

Manifold to Cylinder Head

2001-2016 Duramax

LB7 LLY LBZ LMM LML

Note: These bolt kits are designed to work with OE manifolds only. Aftermarket/Performance manifolds generally require (16) 35mm bolts.

For up-pipe bolts, See DHD 300-112.

You've asked and DHD has delivered:

The perfect addition to any exhaust manifold replacement or upgrade on your Duramax powered Kodiak. Our phosphate & oil coated bolts meet or exceed OE specs. Paired with the bolts are 16 Stainless Steel ARP Washers for the perfect torque and corrosion resistance. This kit is extremely popular with the techs in our shop. No more reusing or wire brushing rusty scaly hardware.

This kit will do both sides of the engine and replace the OE studs.

This Kodiak only kit contains 16 equal length bolts, designed to be used in conjunction with Kodiak specific exhaust manifolds. If your manifolds require 1 short and 1 long bolt, check out DHD 300-110. 

Fitment:

Manifold to Cylinder Head

2002-2009 Duramax

LB7 LLY LBZ LMM

Note: These bolt kits are designed to work with OE Kodiak manifolds only. Aftermarket/Performance manifolds generally require different length bolts.

For up-pipe bolts, See DHD 300-112.

Replace, worn, rusted or broken up pipe hardware with DHD's large flange up pipe bolts. Our phosphate oil coated 10.9 bolts meet or exceed all OEM specs. Their extra large flange guarantees a perfect clamp load and seal every time.

Pair these bolts with our PPE stainless gaskets for a leak free, trouble free install.

Note: 3 bolts included in one package, 2 Kits are Required to do 1 up pipe install.

Remove your crushed oval stock down pipe and replace it with a smooth round, long lasting, 304 stainless steel down pipe. Spiral wrapped with titanium woven thread for superior heat held in place with a couple of stainless steel clamps.

NOTE: For vehicles equipped with an EGR (2002 to 2004 CA vehicles) this tab must be removed with a grinder or cut off wheel.

Note: Legal in California only for racing vehicles which may never be used on the highway. 

Replace the restrictive crushed factory down pipe on your 2017-2020 L5P Duramax with this 3.5" Down Pipe for improved exhaust flow. Black Ceramic Coated and Heat wrapped. Down Pipe includes bungs for sensors and NO tuning required to use this down pipe. 

***Connects to the DOC (Diesel Oxidation Catalyst) outlet flange and mates with OEM exhaust system front pipe with the 4 bolt style flange connection.***

WCFab piping kits and emissions compliant tuning recommended for optimum performance gains.

t has been almost 30 years since we started shipping our first exhaust brakes. With that many hill and mountain roads experienced, we used the knowledge gained to continue to deliver the best designed exhaust brake for your application. Incorporating BD's exclusive Variable Orifice Technology, BD's solid, offset butterfly, spring loaded cylinder and pressure regulation provides up to 150 retarding horsepower throughout the engine's RPM range - not just at high rpm like some designs that use holes or additional parts and claim it as a better idea. A range of rugged, cast-iron housings for Dodge, Ford, Chevy and motor home applications that incorporate BD's exclusive alumibronze bushing, piston ring-seals and stainless steel butterfly shaft has proven to stand-up under the harsh, high heat conditions of the exhaust environment. BD's butterfly valve and rotating shaft are made of stainless steel to resist corrosion. An air compressor is included in most kits for newer pick-up trucks.

• BD's exclusive Variable Orifice Technology
• BD's solid, offset butterfly
• Spring loaded cylinder
• Pressure regulation
• Provides up to 150 retarding horsepower throughout the engine's RPM range
• Rugged, cast-iron housing fits Stock Exhaust
• BD's exclusive alumibronze bushing
• Piston ring-seals
• Stainless steel butterfly shaft
• Proven to stand-up under the harsh, high heat conditions of the exhaust environment
• All mounting hardware are made of corrosion resistant stainless steel
• Air compressor included
• There's a reason why the BD Brake is the most widely-recognized diesel exhaust brake in the industry: It's the best! Compare it to the competition, and you'll see why.

• 5 Hours

Parts

• 24-Months
• 24,000 Miles

Labor

• 12-Months
• 12,000 miles

• 2006-up suggest installing 2001020/2001030 EXBrake instead
• Exhaust Back Pressure test gauge kit 1030050 suggested for the set-up of exhaust brakes
• Requires HP Tuner or EFI Live for 2007-2010 LMM engines
• Typical factory exhaust size of 3.5" on 2001-2007 LB7/LLY/LBZ and 4.0" on 2007.5-2010 LMM. Confirm pipe size before ordering.

t has been almost 30 years since we started shipping our first exhaust brakes. With that many hill and mountain roads experienced, we used the knowledge gained to continue to deliver the best designed exhaust brake for your application. Incorporating BD's exclusive Variable Orifice Technology, BD's solid, offset butterfly, spring loaded cylinder and pressure regulation provides up to 150 retarding horsepower throughout the engine's RPM range - not just at high rpm like some designs that use holes or additional parts and claim it as a better idea. A range of rugged, cast-iron housings for Dodge, Ford, Chevy and motor home applications that incorporate BD's exclusive alumibronze bushing, piston ring-seals and stainless steel butterfly shaft has proven to stand-up under the harsh, high heat conditions of the exhaust environment. BD's butterfly valve and rotating shaft are made of stainless steel to resist corrosion. An air compressor is included in most kits for newer pick-up trucks.

• BD's exclusive Variable Orifice Technology
• BD's solid, offset butterfly
• Spring loaded cylinder
• Pressure regulation
• Provides up to 150 retarding horsepower throughout the engine's RPM range
• Rugged, cast-iron housing fits 4" Aftermarket Exhaust
• BD's exclusive alumibronze bushing
• Piston ring-seals
• Stainless steel butterfly shaft
• Proven to stand-up under the harsh, high heat conditions of the exhaust environment
• All mounting hardware are made of corrosion resistant stainless steel
• Air compressor included
• There's a reason why the BD Brake is the most widely-recognized diesel exhaust brake in the industry: It's the best! Compare it to the competition, and you'll see why.

• 5 Hours

Parts

• 24-Months
• 24,000 Miles

Labor

• 12-Months
• 12,000 miles

• 2006-up suggest installing 2001020/2001030 EXBrake instead
• Exhaust Back Pressure test gauge kit 1030050 suggested for the set-up of exhaust brakes
• Requires HP Tuner or EFI Live for 2007-2010 LMM engines
• Typical factory exhaust size of 3.5" on 2001-2007 LB7/LLY/LBZ and 4.0" on 2007.5-2010 LMM. Confirm pipe size before ordering.

The BD Full Bore Exhaust Manifold for the Chevy Duramax engine replaces factory driver's side "pinched down" unit, restoring exhaust flow and balances the V8 engine for smother running. Flow design will accommodate enhanced performance engines by aiding them in improving exhaust velocity to drive the turbocharger, improving power, increasing economy and lowering EGT's. Made from high-silicon ductile iron, the Full Bore is a direct, bolt-in replacement for the factory manifold and is even drilled and tapped to accept the most popular EGT probes.

• Replaces factory driver's side "pinched down" unit
• Restores exhaust flow and balances the V8 engine for smoother running
• Improves exhaust velocity to drive the turbocharger
• Improves power
• Direct, bolt-in replacement
• Tapped to accept the most popular EGT probes
• High-silicon ductile iron
• Lower EGT's

• 3 Hours

Parts

• 36-Months
• 75,000 Miles

• Gaskets sold seperately
• Replaces OEM # 12624684, 12637647, 97224587

Replaces the factory exhaust up-pipes (exhaust manifold to the turbo) which are prone to leakage due to the deterioration. BD up-pipes are designed to minimize restriction to the turbo utilizing internally shielded expansion bellows. The BD up-pipes are a durable, longer-life replacement for this common problem and are perfect as an upgrade while performing other engine or transmission repairs.

FEATURES

• 304 stainless steel precision cast mounting flanges eliminate exhaust tubing blowouts and ensures correct fitment
• 304L 2-inch stainless tubing prevents loss of heat energy and will not corrode like aluminized steel or 409 stainless
• Larger bore (1.8" ID) internally shielded 304 stainless bellows, eliminates restrictive 1.3" ID OEM bellows maximizing exhaust energy to drive turbocharger
• Smooth mandrel bends improve exhaust gas flow - tubing ID is not compromised
• Increased turbo response with lower EGT's
• User must have aftermarket downpipe, does not fit with OE Downpipe
• Includes Gaskets

• 5 Hours

• 12-Months
• 24,000 Miles

• Aftermarket downpipe required - Some modification necessary
• Not for sale on licensed California vehicles

These stainless ties work great for heat wrap on downpipes and up pipes. They are 1 time use. Sold by the piece.

Controlling under hood temperatures is crucial to protect electronics and rubber/plastic components. Its no secret our diesel engine bays are packed with hoses and electronics. Protect them by adding heat wrap to exhaust components. Up-pipes and downpipes are excellent candidates for heat wrap.

Features:

• 2" x 100ft Roll
• 1.5mm Thick Fiberglass

Notes for Installation:

• Use the right product. This header wrap is 1.5MM thick fiberglass, which is ideal for most street or race cars, trucks, bikes, or boats. It substantially insulates exhaust parts while allowing some of the heat to escape, preventing overheating and fatigue (or "burn-out", as it's sometimes called). Do not double wrap, and do not use too much overlap! The recommended amount of overlap to use is 1/4".
• Don't go crazy. There is definitely such a thing as too much exhaust insulation. Over-insulating exhaust parts is the primary cause of parts fatigue and early failure! There are probably over 100 different types of exhaust wrap, many promising better insulation at an increased price. But you don't want better insulation; you want exactly the amount of insulation that this product offers. If you use excessive overlap, double-wrap, or use overly aggressive exhaust wrap, you'll be much more likely to have problems. Furthermore, if you use too much exhaust wrap in the same place, it can actually prevent the metal from expanding properly, compounding the problem.
• Install dry. It's been suggested by some websites and manufacturers of exhaust wrap that you get it damp prior to installing. This makes it easier to install and gives you a better seal to hold in more heat. It's hard to say how much damage would be caused by this one-time moisture, but it probably doesn't help. Clean and dry your exhaust parts before installing, and install the product dry to get a good head start on rust prevention.
• Keep dry. The main reason exhaust wrap can cause premature rust is because it holds moisture. If you're cleaning your engine bay, go ahead and put a plastic bag over your wrapped headers - the cleaning supplies won't do much to clean the exhaust wrap anyways. If you happen to drive through a lake by mistake, consider removing the header wrap, drying, and re-installing. If you drive through a lake on purpose and regularly, using header wrap probably isn't the best idea... unless your components are stainless steel.

Important:

• Note: it is normal for exhaust wrap to smoke and smell funny for a couple hours after installation.

Controlling under hood temperatures is crucial to protect electronics and rubber/plastic components. Its no secret our diesel engine bays are packed with hoses and electronics. Protect them by adding heat wrap to exhaust components. Up-pipes and downpipes are excellent candidates for heat wrap.

Features:

• 2" x 50ft Roll
• 1.5mm Thick Titanium Weave

Notes for Installation:

• Use the right product. This header wrap is 1.5MM thick titanium weave, which is ideal for most street or race cars, trucks, bikes, or boats. It substantially insulates exhaust parts while allowing some of the heat to escape, preventing overheating and fatigue (or "burn-out", as it's sometimes called). Do not double wrap, and do not use too much overlap! The recommended amount of overlap to use is 1/4".
• Don't go crazy. There is definitely such a thing as too much exhaust insulation. Over-insulating exhaust parts is the primary cause of parts fatigue and early failure! There are probably over 100 different types of exhaust wrap, many promising better insulation at an increased price. But you don't want better insulation; you want exactly the amount of insulation that this product offers. If you use excessive overlap, double-wrap, or use overly aggressive exhaust wrap, you'll be much more likely to have problems. Furthermore, if you use too much exhaust wrap in the same place, it can actually prevent the metal from expanding properly, compounding the problem.
• Install dry. It's been suggested by some websites and manufacturers of exhaust wrap that you get it damp prior to installing. This makes it easier to install and gives you a better seal to hold in more heat. It's hard to say how much damage would be caused by this one-time moisture, but it probably doesn't help. Clean and dry your exhaust parts before installing, and install the product dry to get a good head start on rust prevention.
• Keep dry. The main reason exhaust wrap can cause premature rust is because it holds moisture. If you're cleaning your engine bay, go ahead and put a plastic bag over your wrapped headers - the cleaning supplies won't do much to clean the exhaust wrap anyways. If you happen to drive through a lake by mistake, consider removing the header wrap, drying, and re-installing. If you drive through a lake on purpose and regularly, using header wrap probably isn't the best idea... unless your components are stainless steel.

Important:

• Note: it is normal for exhaust wrap to smoke and smell funny for a couple hours after installation.

DHD Duramax Turbocharger Performance Downpipes

Our downpipe provides a smooth and consistent 3 bore throughout the entire length of the pipe which equates to better CFM flow over the stock down-pipe. Our design features a greater offset at both bends to create approximately 1 inch greater clearance between the down-pipe and the up-pipe. This clearance allows room for high flow aftermarket exhaust manifolds & up-pipes where as most aftermarket down pipes will have to be bent, or chrimped in order to clear.

Take a look at your OEM up-pipe and notice the cross sectional changes needed to clear the downpipe and engine. More airflow means more horsepower! Our competitors dont provide this additional clearance with their downpipe so you will have to bend or crimp in order to make work. Our downpipes are all built with 100% T304 stainless steel, including all flanges. Again, this is an industry first, and a feature not available from our competitors.

Note: A few washers may be needed to shim the dipsitck tube from the down pipe.

Downpipe Fitment

300-101 Chevy/GM 2001-2004 LB7 Federal

301-101 Chevy/GM 2001-2004 LB7 California

300-102 Chevy/GM 2004.5-2010 LLY, LBZ, LMM

300-108 Chevy/GM 2011-2013 LML

DHD's high flow manifold bundle increases exhaust air flow over 55% without any port modifications. Additional gains can be found in port matching and port blending. Our manifolds are cast from the same high Silca Iron that's become standard in the high flow manifold market. Included in the high flow bundle are our .120" wall thickness 304 stainless steel up pipes, featuring sleeved bellows and double welded pipe/flange connections.

Our manifolds swept back tapered inner diameter port design will accelerate exhaust gases to the turbine, lowering EGTS and making it easier for the turbo to spool quickly. 

Features / Benefits:

• Reduced Back pressure
• Improve Fuel Economy
• Lower EGT's and drive pressure
• Quicker turbo spool up
• 1/8NPT Bungs in each manifold for EGT or Drive Pressure Sensor

Bundle Includes:

• Right and Left Cast Manifolds
• Right and Left .120" Wall Stainless Up Pipes
• 16 4340 Chromoly M10 12pt Manifold Bolts (Not cheap socket cap screws)
• 2x 1/8NPT Port Plugs
• MLS Stainless Up Pipe Gasket Set (4 gaskets)
• MLS Stainless Manifold Gasket set (2 gaskets)
• 12 12.9 M10 12pt Up Pipe Bolts

Notes:

• The passenger side up pipe is D shaped to allow for use with most aftermarket downpipes. However, slight modifications may need to be made to get the best fit depending on downpipe brand.
• There is no EGR riser on the passenger side up-pipe. This kit is not a direct replacement for trucks equipped with EGR and should only be installed on pre-emission equipped trucks. 

DHD's double stitch titanium manifold blankets raise the bar for quality, fit and protection. These are NOT your average Amazon heat blanket. Our blankets are MADE IN THE USA with 2 ultra thick, tight woven silica imbedded layers of fiberglass. We have consistently had these blankets at 1,800°F with no signs of deterioration, and they are rated for exposures up to 3000 degrees! These same blankets can be found on our 2000HP Last Minute Hooker and Cheap Hooker.

Features:

• Double Stitched Exterior 
• Triple Stitched Fold
• Oversize Anchors Eliminate Pull Through
• EGT Ring Grommet Provision
• Symmetrical Left and Right Set
• Fits Tube or Cast Style High Flow Manifolds (DHD 300-120, PPE)
• Made in the USA for DHD
• Compare to PPE 116016000 Blankets

The use of manifold heat blankets can help the turbo spool faster, lower intake air charge temps, lower under-hood temps and reduce the chances of damaging wiring, plumbing or plastic components. 

Everything you need to service 1 Duramax up pipe. Works on both passenger or driver side up pipes. Unlike our competitors, these bolts are dimensionally the same as OE. 

Kit Includes:

(1) Triple Layer Stainless Up Pipe to Turbo Gasket

(1) Triple Layer Stainless Up Pipe to Manifold Gasket

(6) 12PT 12.9 Coated M10 Bolts

Fitment:

2001-2016 Duramax LB7 LLY LBZ LMM LML

DHD's Replacement Passenger Side Exhaust Manifold Kit is perfect for replacing your cracked, damaged or severely rusted manifold.  Its not uncommon to have hardware break off in the manifold during engine service. Save time and struggle by replacing the manifold. Best of all, our manifold comes standard with the heat shield, gaskets and hardware to do the job! 

Included:

• (1) Mahle Manifold Gasket
• (1) Mahle Up Pipe Gasket
• (1) Passenger OE Replacement Manifold
• (1) Passenger Heat Shield and Hardware
• (3) DHD Large Flange Up Pipe Bolts
• New Grade 10.9 DHD Manifold Hardware with Stainless ARP Washers

Note: DHD's supplied hardware is designed to eliminate the factory exhaust manifold studs which are often to rusty or damaged to reuse.

Fitment:

2001-2016 Chevrolet/GMC 6.6L Duramax.

RH Side

Passenger Side

Compare to:

GM 12624683

Dorman 674-736

This kit contains a full set of triple layer Stainless Steel MLS Up Pipe Gaskets.

Kit includes 4 Gaskets!

2 Up Pipe to Turbo Gaskets

• GM Replacement Part# 97192618

2 Manifold to Up Pipe Gaskets

• GM Replacement Part# 97188685

A leaky up pipe gasket cause a ticking sound within the engine bay and drastically decrease the efficiency of your turbo. Lost drive pressure means lower boost!

Fitment:

2001-2016 Duramax LB7, LLY ,LBZ, LMM, LML

Not all up pipe bolts are created equal! Its just about impossible to find the correct dimension M10 bolt with the correct shoulder and socket size as factory. Well, not anymore!

DHD's up pipe bolts are designed to be an exact replacement for your rusty or broken OE hardware. These bolts work well on both OE and aftermarket up pipes. Their narrow 19mm flange typically even clears the welds on high flow oversize up pipes.

Need a whole set? Save money by using the option menu to buy 12 at a discounted price!

Features:

• M10 x 1.5 x 30MM
• Durable Black Coated Finish
• 12 Point 12MM Socket Sizing
• 19MM Flange
• Grade 12.9

Applications:

• 2001-2016 Duramax 6.6L Up Pipes
• 2001-2004 LB7 Downpipe Turbo Flange ( 4 Req'd )

DHD Duramax Turbocharger Performance Downpipes

Get rid of that ugly restrictive downpipe and replace it with our 3" Stainless downpipe w/heat wrapping which creates better flow making "MO POWA BABY." Our downpipe provides a smooth and consistent 3" bore throughout the entire length of the pipe which equates to better CFM flow over the stock down-pipe.

Note: A few washers may be needed to shim the dipstick tube from the down pipe.

Features:

• 3" 304 Stainless Steel Tube
• TIG Welded, Jig Built Construction
• Zinc Coated Flanges
• Titanium Heat Wrap
• Downpipe Support Tab

Fitment:

• 2004.5-2010 Duramax 6.6L 
• LLY LBZ LMM

DHD Duramax Turbocharger Performance Downpipes

Get rid of that ugly restrictive downpipe and replace it with our 3" Stainless downpipe w/heat wrapping which creates better flow making "MO POWA BABY." Our downpipe provides a smooth and consistent 3" bore throughout the entire length of the pipe which equates to better CFM flow over the stock down-pipe. This is a complete stock replacement comes with the three bungs that are on the factory down pipe. 2011-2015

Features

• 304 Stainless Tube
• Tig Welded, Jig Built Construction
• Zinc Coated Flanges
• 3 Factory Location Emission Sensor Bungs
• Fiber Glass Heat Wrap
• Down Pipe Support Tab

Fitment:

• 2011-2015 Duramax 6.6L
• LML Flatform with V-Band Exhaust Flange

Note: 2015.5-2016 LML Trucks can be converted to this V-band style downpipe however the exhaust will have to be modified accordingly.

DHD Duramax Turbocharger Performance Downpipes

Our downpipe provides a smooth and consistent 3 bore throughout the entire length of the pipe which equates to better CFM flow over the stock down-pipe. Our design features a greater offset at both bends to create approximately 1 inch greater clearance between the down-pipe and the up-pipe. This clearance allows room for high flow aftermarket exhaust manifolds & up-pipes where as most aftermarket down pipes will have to be bent, or chrimped in order to clear.

Take a look at your OEM up-pipe and notice the cross sectional changes needed to clear the downpipe and engine. More airflow means more horsepower! Our competitors dont provide this additional clearance with their downpipe so you will have to bend or crimp in order to make work. Our downpipes are all built with 100% T304 stainless steel, including all flanges. Again, this is an industry first, and a feature not available from our competitors.

Note: A few washers may be needed to shim the dipsitck tube from the down pipe.

Downpipe Fitment

300-101 Chevy/GM 2001-2004 LB7 Federal

301-101 Chevy/GM

300-102 Chevy/GM 2004.5-2010 LLY, LBZ, LMM

300-108 Chevy/GM 2011-2013 LML

Replacement Passenger Side RH Exhaust Manifold for 2001-2016 Duramax.

Replace your cracked, rusted or damaged exhaust manifold with this new GM replacement. Its not uncommon to have hardware break off in the manifold during engine service. Save time and struggle by replacing the manifold.

Pair this manifold with our DHD 300-110 Bolt kit & PPE Stainless 118062010 Gaskets for a leak free, trouble free install.

Associated Up-Pipe Gasket Req'd GM 97188685

GM 12637647 LML Duramax Diesel Driver Side Exhaust Manifold (Will Fit 01-16)

This is the new style exhaust manifold that GM has introduced for the new body style pickups. This manifold is now the factory unit on all LML trucks, but makes a great upgrade for all the 01-10 Duramax owners. This new manifold will flow better than the original OEM unit due to the reduced pinch area near steering shaft. This will greatly increase flow characteristics over the original unit and makes a great alternative to higher priced aftermarket manifolds.

Ensure proper torque and sealing by replacing broken, worn and rusted hardware with DHD's 300-110 Exhaust Manifold Bolt Kit and DHD's 300-112 Large Flange Up-Pipe Bolt Kit.

This is a genuine GM Duramax Diesel Exhaust Manifold Gasket for L5P equipped trucks and vans. This gasket will work on all the 2017-2020 model years and 2 are required per engine application.

Features:

• 5 Layer MLS Gasket
• Built in OE Heat Shield
• Wont Fit 2001-2016

GM 97302261 Exhaust Manifold Turbochager Passenger Side Up-Pipe LB7 Duramax

This is a genuine OEM GM exhaust manifold up-pipe. This is the passenger side unit and does not come with any EGR riser on it. This unit will actually work on any 2001-2016 Duramax engine and is often a popular upgrade on any 2004-2016 Duramax truck as they flow better than the factory passenger side up-pipe.

For a more economical high flow up pipe, see PPE's 304SS Passenger Side Up Pipe. At half the price, the PPE up pipe is packed with tons of upgrades making it a superior value. High flow, thick flanges, sleeved bellows and stainless steel.

Fabric Heat Shield Blankets will help spool the turbo faster, lower intake air charge temps, lower under hood temps and stop heat from melting wires or electronics. This is not your average fiberglass blanket material! Black in color.

Fits PPE Manifolds and DHD 300-120 High Flow Manifold Kit

The PPE 116120000 Replacement Up-Pipes for your 2001-2004 GM 6.6L Duramax increase flow, and reliability. Even a stock Duramax can produce high temperatures and pressures that cause OEM up pipes eventually fail from constant temperature and pressure fluctuation. PPE has taken the OEM replacement to a new level. PPE OEM Up-Pipes allow 53% greater flow over stock, and are a direct bolt-on to your factory manifolds. But unlike factory parts, PPE OEM Up-Pipes are manufactured from 11 gauge 304 stainless steel and include PPE's superior 304 stainless steel, internally-sleeved bellows that can take the abuse of high temperatures and pressures. Uses stock exhaust manifolds and hardware. FEATURES: Bolt-On Replacement (Non-EGR) Faster Spool-Up & Increased Performance Significant Reduction In Exhaust Back Pressure Free-Flowing Stainless Steel Inner Liner Bellows Stainless steel 11-gauge .120-inch wall, 2-inch OD Up-Pipes Note: These race up-pipes do not retain the use of the EGR. They are for off-road use only and will only work on non-EGR applications. CA Residents: Not legal for sale or use in California on pollution controlled motor vehicles.

These full featured OEM fit up pipes are an excellent value! These are brand new and include all the high flow, high quality features your looking for at half of a new GM LB7 up-pipe price.

PPE has taken OEM replacement to a new level. These PPE OEM Up-Pipes allow 53% greater flow than stock. PPE OEM Up-Pipes are a direct bolt-on to your factory manifolds. Unlike factory parts, PPE OEM Up-Pipe are manufactured from 11 gauge 304 stainless steel and includes PPE's superior 304 stainless steel, internally-sleeved bellow that can take the abuse of high temperature and high pressures.

Features:

    *    Direct bolt-on replacement to passenger side factory exhaust manifold  
    *    Significant reduction in exhaust back-pressure
    *    Free-flowing stainless steel inner liner bellows
    *    Stainless steel 11-gauge .120-inch wall, 2-inch OD Up-Pipes
    *    Faster turbo response
    *    Lower exhaust temperatures 
 

Applications: 2001+ GM 6.6L Duramax 2500HD/3500HD

To complete your leak free install, pair this up pipe with DHD Up Pipe Gasket and Bolt Set 300-126.

Select from the options menu above.

* Note: LEGAL IN CALIFORNIA ONLY FOR RACING VEHICLES THAT MAY NEVER BE USED, OR REGISTERED OR LICENSED FOR HIGHWAY OR OFF-ROAD USE.

50 States Emissions Legal (E.O. D-701-33)

GM trucks equipped with the L5P diesel are a modern marvel of engineering and design. They're a winning combination: a powerful workhorse, with low emissions, and great styling. Unfortunately, they have been outfitted with undersized, restrictive stock up-pipes.

Now you can upgrade the L5P to achieve higher-flow by bolting on PPE OEM-Length Replacement High-Flow Up-Pipes. These direct replacements have a 46% larger flow area over stock, which results in a deeper-breathing power-plant, while maintaining the mandated Federal emissions standards of stock.

The PPE OEM-Length Up-Pipes are manufactured from 11 gauge 304 stainless steel. These new Up-Pipes include the superior PPE internally-sleeved bellows, also manufactured from 304 stainless steel.

This system is engineered to take the abuse of high temperatures and high pressures, while promoting increased exhaust flow and lower EGTs. A superior product for your modern marvel.

Features:

• 46% larger flow area over stock 
• Manufactured from 11 gauge 304 stainless steel 
• 304 stainless steel, internally-sleeved bellows 
• Direct bolt-on replacement 
• Includes 301 stainless steel gaskets 

GM Equivalent P/Ns: 12676611, 12688021

 Installation Guide: 116122000 OEM Up Pipes GM 6.6L L5P_v2C.pdf