Description
Product Overview
The Duramax LMM EGR Delete Kit is a comprehensive emissions system bypass solution for 2007.5-2010 Chevrolet Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD trucks equipped with the 6.6L LMM Duramax turbo diesel. This kit eliminates the failure-prone EGR cooler and valve system — the leading cause of coolant loss, intake carbon buildup, and reduced performance on LMM-platform trucks. For off-road/competition use only.
Key Features
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Stainless Steel Passenger Up-Pipe: T304 stainless steel mandrel-bent up-pipe replaces the restrictive EGR-equipped factory pipe. Precision TIG-welded for leak-free exhaust flow.
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CNC Billet Aluminum Block-Off Plates: 6061-T6 aluminum plates with laser-cut gaskets seal the EGR valve and EGR cooler ports permanently.
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Complete Gasket & Hardware Kit: Includes MLS (multi-layer steel) exhaust gaskets and Grade 10.9 hardware — everything needed for installation.
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Eliminates EGR Cooler Failure: The LMM EGR cooler is a known catastrophic failure point — when it cracks internally, coolant enters the intake and can hydrolock the engine. Delete it, delete the risk.
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Improved Intake Cleanliness: No more carbon/soot recirculation into the intake manifold. Keeps intake runners, valves, and MAP sensor clean for consistent performance.
Compatibility
| Year |
Make |
Model |
Engine |
| 2007.5-2010 |
Chevrolet |
Silverado 2500HD |
6.6L LMM Duramax V8 Turbo Diesel |
| 2007.5-2010 |
Chevrolet |
Silverado 3500HD |
6.6L LMM Duramax V8 Turbo Diesel |
| 2007.5-2010 |
GMC |
Sierra 2500HD |
6.6L LMM Duramax V8 Turbo Diesel |
| 2007.5-2010 |
GMC |
Sierra 3500HD |
6.6L LMM Duramax V8 Turbo Diesel |
Important Notes
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⚠️ OFF-ROAD / COMPETITION USE ONLY — Not legal for on-road vehicles under EPA/CARB regulations.
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⚠️ ECU TUNING REQUIRED — This kit includes hardware only. You must use an aftermarket tuner (EFILive, EZ Lynk, HPTuners) to disable EGR-related DTCs or the check engine light will illuminate.
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⚠️ Professional Installation Recommended — Up-pipe replacement requires turbocharger removal on LMM models. Budget 4-6 hours for installation.
Frequently Asked Questions
Q: What's included in this LMM EGR delete kit?
A: This kit includes: (1) Passenger-side EGR up-pipe (stainless steel), (2) EGR valve block-off plate (billet aluminum), (3) EGR cooler block-off plates, (4) All required gaskets and hardware. ECU tuning is required to prevent DTCs and check engine light.
Q: Do I need ECU tuning after installing this kit?
A: Yes. Removing the EGR system will trigger diagnostic trouble codes (P0401-P0408). You will need a tuner or custom ECU tune to disable EGR-related DTCs and prevent limp mode. This kit includes hardware only — not tuning.
Q: Is this legal for street use?
A: No. This EGR delete kit is intended for OFF-ROAD / COMPETITION USE ONLY. Removing emissions equipment from on-road vehicles violates EPA Clean Air Act regulations. Please check your local laws before purchase.
Q: What are the benefits of deleting the EGR on an LMM Duramax?
A: EGR delete eliminates carbon/soot recirculation into the intake — preventing intake manifold clogging, reducing EGTs, improving throttle response, and eliminating the failure-prone EGR cooler (a known failure point that can cause coolant loss and hydrolock on LMM engines).
