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Sinister Diesel EGR Upgrade Kit w/Passenger Side Up-Pipe for 2004.5-2005 GM Duramax LLY 6.6L

Pricing: $469.00

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This kit includes the Sinister Diesel EGR Delete Kit & Sinister Diesel Passenger Side Up-Pipe for your 2004.5-2005 GM 2500/3500 HD. The EGR delete kit takes the place of your stock EGR Valve and Cooler system. This kit fits the 6.6L LLY Duramax and provides your engine with improved exhaust gas flow, resulting in faster turbo spool and lower engine temperatures.

Competition tested at over 700hp the Sinister Diesel EGR delete is a must have for your drag or sled pull truck. Every EGR delete kit is manufactured in house from 304 stainless steel and billet aluminum. This race kit completely replaces the entire EGR system and can be installed in 6-8 hours without removal of the intake manifold.

Important Note: Race tuning is required to prevent an illuminated check engine light.


  • Nickel Plated Steel and CNC Machined Billet Aluminum Construction
  • Fully TIG welded and pressure tested
  • Cleaner Intake Air
  • Quicker turbo spool with lower EGTs
  • Faster recirculation of the coolant resulting in lower coolant temps


  • (1) Sinister Diesel 6.6 LLY Duramax EGR Delete
  • (1) Sinister Diesel 6.6 LLY Duramax Passenger Up-Pipe
  • All hardware needed for installation

This LLY Duramax EGR Delete Kit with high flow intake has been competition tested to over 700hp making it an ideal upgrade for your high power drag or sled-pull truck!


Shipping Information

  • Item Requires Shipping
  • 6.0 lbs.
  • W4.0000” x H10.0000” x L4.0000”
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