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DHD 500-112 High Performance High RPM LB7 & LLY Duramax Water Pump

500-112 - 11C

Pricing: $314.95
5 5 3

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Dirty Hooker Diesel 500-112 High Performance High RPM Water Pump LB7 LLY Duramax

With the advancements in technology and tuning, these Duramax diesels are producing more horsepower and torque than originally intended and thus the water pump suffers. We have come up with a solution to the problematic water pump on the 2001-2005 LB7 & LLY Duramax Diesels. Our water pump does not utilize the heavy cast water pump wheel, but a light weight resin wheel. Our lightweight impeller prevents impeller spin and decreases cavitation traditionally encountered at high RPM. Each pump cover is modified to bolt right in place of the existing pump. Everything is included with the pump in order to install.

Warranty 12month/12,000 miles


  • 100% OE Grade GM Water Pump Base Components
  • Lightweight Resin Impeller Wont Crack, Loosen or Spin off the Pump Shaft @ High RPM
  • Modified Pump Cover to be 100% Compatibly with your LB7 and LLY
  • Upgraded Stainless Hardware and Seals Included
  • Pump Comes Assembled, Ready to Install.

Kit Includes:

  • 94011603 Bypass Tube Lower O-Ring
  • 94013304 Pump to Front Cover Large O-Ring
  • 12635594 Pump Outlet Flange Gasket
  • Long Stainless Bolt to Block Replace Stud
  • Short Stainless Bolt 

Why Not Welded Water Pump?

  • With DHD's resin wheel water pump impeller there is no need to have any components welded. We have found that welding of two dissimilar metals nearly always results in cracks or premature failures. Its also not uncommon to have pump shaft bearing failures on welded pumps. This is likely because of small imperfections induced into the bearing surface from an arc created while the welder is grounding.



Shipping Information

  • Item Requires Shipping
  • 10.0 lbs.
  • W11.0000” x H11.0000” x L11.0000”
  • Free Shipping

Customer Reviews

Comment Total Reviews (3)

Outstanding quality!
  • Currently 5/5 Stars

Reviewed by:

Product ownership: Less than 1 month

Purchased from: Dirty Hooker Diesel

This water pump is everything they say an then some. Shipping was fast and It installed flawlessly without any issues. I couldn't be happier with this pump an the customer service of this company.

  • Currently 5/5 Stars

Reviewed by:

Product ownership: Less than 1 week

Purchased from: Dirty Hooker Diesel

Replaced due to leaking pump, nice welds on custom housing. Hopefully some added cooling for my LLY. Great product guys and fast shipping is nice!

Just installed......
  • Currently 5/5 Stars

Reviewed by:

Product ownership: Less than 1 week

Purchased from: Dirty Hooker Diesel

Fit great, easy and seals were all correct. I have a 2001 Federal LB7. Their customer service is freaking amazing. I had not noticed a cracked Turbo Coolant Tube until after I ordered my pump from them. Nobody had it in stock around my county, so I called them to see if they could stick it in the same box as my pump because it was being overnighted to me. They went above and beyond to make it happen. Thank you for the help! Ill be back with a 6 month update.

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