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Sinister Diesel EGR Upgrade Kit w/ High Flow Intake Tube for 2004.5-2005 GM Duramax LLY 6.6L

Pricing: $349.00

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This Sinister Diesel EGR Delete Kit for your 2004.5-2005 GM 2500/3500 HD takes the place of your stock EGR Valve and Cooler systemand even includes a mandrel-bent Aluminum intake finished in high-gloss Sinister Blue powder coat. 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.

The Sinister Diesel LLY Duramax EGR Delete is made in-house at the Sinister Diesel California manufacturing facility from strong nickel plated steel and machined billet aluminum then fully TIG welded and pressure tested to ensure unrivaled durability and leak-free service under the harshest conditions. The Sinister Diesel EGR also improves engine reliability by recirculating your engine coolant faster than the stock EGR system for lower coolant temperatures, and also keeping your intake manifold free from power-robbing, hot, sooty air.

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


  • Nickel Plated Steel and CNC Machined Billet Aluminum Construction
  • Mandrel bent High Flow Intake with High-Gloss Sinister Blue Powder Coat
  • Fully TIG welded and pressure tested
  • Quicker Turbo Spool
  • Cleaner Intake Air


  • (1) Sinister Diesel 6.6 LLY Duramax EGR Delete
  • (1) Sinister Diesel High Flow Intake Tube
  • 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.
  • W10.0000” x H14.0000” x L10.0000”
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