DHD 300-118 Duramax High Flow SS Tube Manifolds Left and Right 2001-2004 LB7

DHD's new thick wall tubular manifolds increases exhaust air flow over 45% without any port modifications. An additional 30% in flow gains can be found in port matching and port blending. These race manifolds are constructed of thick wall .130" stainless tubing, 1/2" thick steel flanges and tig welded inside and out. These manifolds are designed to utilize the same extended length up-pipes as those found in our cast high flow kits, as well as PPE kits.

Going tubular will save weight and improve fitment around engine mounts, control arm mounts and aftermarket cold side pipes.

We have over a year into testing these manifolds on multiple competition vehicles, including our ProStreet truck Last Minute Hooker. We are confident in their ability to flow and withstand extreme EGT's. You wont find a lighter, higher flowing, more versatile Duramax manifold. 

Note: Will not work with OE stock length up pipes. Must use DHD or comparable extended length up pipe.

Features / Benefits:

• Reduced Back pressure
• 5lbs Lighter Then Cast (9lbs vs 14lbs Per Manifold)
• Tubular Construction Allows Direct Mount Wastegates
• Increased Chassis Clearance
• 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
• Manifolds Accepts DHD 300-122 Thermal Blankets

Includes:

• (RAW) Uncoated Right and Left Fabricated .130" Stainless Tube Manifolds
• 2x 1/8NPT Port Plugs

Optional:

Use the Menu above to add Mahle OE Grade Manifold Gaskets and 4340 Chromoly 12pt Manifold Hardware. Up pipe hardware and Gaskets sold separately.