2004-2007 GM / Chevy Duramax 6.6L LLY/LBZ
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EGR Cooler Delete | GM Duramax Diesel 2006-2007 LBZ
Original price was: $495.$440Current price is: $440.
Up-pipe High Flo 2001-2007 GM Duramax 6.6L
Original price was: $199.$179Current price is: $179.
Exhaust Manifold Kit w/ Up-Pipe 2001-2016 GM Duramax 6.6L
Original price was: $1,100.$880Current price is: $880.
LBZ, LMM YB-DMX-Y-Bridge Kit 2006-2010 GM Duramax
Original price was: $825.$550Current price is: $550.
Hot Side Intercooler Charge Pipe Kit 2004-2007 GM Duramax 6.6L
Original price was: $297.$220Current price is: $220.
Down-pipe 2004.5-2010 GM Duramax 6.6L
Original price was: $275.$220Current price is: $220.2004–2007 GM 6.6L LLY/LBZ Duramax Delete Kits & Performance Products
This collection covers every LLY/LBZ delete kit, exhaust, EGR component, and tuner we sell for the 2004–2007 6.6 LBZ Duramax and lly Duramax platforms. All products fit Chevy Silverado 2500HD/3500HD and GMC Sierra 2500HD/3500HD pickup trucks – the EFI Live tuner also supports Cab & Chassis.
What’s Sold in This Category
- Full Delete Kit – One LLY/LBZ Duramax delete kit for 2006–2007 LBZ pickup trucks only. Includes EFI Live AutoCal V3 tuner, EGR delete hardware, and your choice of 4-inch or 5-inch T409 stainless steel Downpipe-Back exhaust system.
- EGR Cooler Delete – High-grade aluminum EGR cooler delete. All necessary hardware and gaskets included. This is the EGR delete kit that addresses soot recirculation and coolant contamination risk.
- EFI Live AutoCal V3 – The only tuner on this platform. Custom-tune OBD-II handheld programmer covering LLY (2004.5–2005) and LBZ (2006–2007). Power levels: Stock, Eco/Tow (+65HP), Street (+100HP), Max Power (+130HP).
- Exhaust Systems -4-inch and 5-inch Downpipe-Back exhaust systems in T409 stainless steel for the lly Duramax exhaust and LBZ platforms. Both connect to the factory downpipe – no DPF to remove on these pre-emission trucks. Both available with or without a muffler.
- Performance Accessories – 2-inch stainless steel Up-Pipe High Flo (passenger side), non-EGR up-pipe, S&B cold air intake for improved air intake flow, standalone 4-inch and 5-inch universal diesel mufflers in stainless steel.
Key Features and Benefits of the LLY/LBZ Duramax Delete Kit
- Cleaner intake without EGR cooler soot recirculation.
- Better tow response from unrestricted Downpipe-Back exhaust.
- Up to +130HP with EFI Live custom calibration.
- Improved fuel efficiency with properly calibrated tow tune.
Supported Models
- 2004.5–2005 6.6L LLY Duramax (Chevy Silverado / GMC Sierra 2500HD & 3500HD).
- 2006–2007 6.6L LBZ Duramax (Chevy Silverado / GMC Sierra 2500HD & 3500HD).
Not sure which exhaust or LBZ Duramax delete kit component fits your GM diesel? Call, email, or WhatsApp us – we’ll sort out fitment based on your engine code and build date. These performance parts are for off-road use only. Check your local laws and emission regulations before purchasing.
FAQ
Not entirely - it depends on the product. The full delete kit and EGR Cooler Delete fit 2006–2007 LBZ only. The lly Duramax gets tuner support through the EFI Live AutoCal V3 (covers both LLY and LBZ) and the exhaust systems fit both platforms. If you've got a 2004.5–2005 LLY, the tuner and exhaust are your options - the EGR hardware isn't available for LLY in this collection. Check your RPO sticker to confirm your engine code before ordering.
EFI Live offers four power levels: Stock, Eco/Tow (+65HP), Street (+100HP), and Max Power (+130HP). Most truck owners run the Street or Tow calibration for daily driving and towing. The Max Power calibration is intended for more aggressive setups - the LBZ's CP3 injection system handles it well, but keep in mind that the LBZ is known for head gasket stress under heavy modification at high power levels. Torque climbs with the horsepower gains - you'll feel it most in throttle response and mid-range pull.
Yes - particularly on the Eco/Tow calibration. Removing the EGR system stops soot from recirculating through the intake, which lets the engine run cleaner and more efficiently. Most owners report 1–3 MPG improvement on highway. Running the Max Power tune aggressively won't save fuel - it'll make power instead. Proper maintenance of the delete calibration keeps fuel efficiency consistent over time.
The factory tow rating doesn't change - that's set by the frame and axle. What changes is how the engine delivers power under load. EGTs drop, throttle response sharpens and airflow stays cleaner under sustained load. The Eco/Tow tune is specifically calibrated for sustained load - it adds +65HP while keeping the calibration conservative enough for long pulls.
The exhaust is a bolt-on job from underneath - most owners handle it in a few hours. The EGR Cooler Delete takes more time because the cooler sits tight between the intake manifold and the block on the LBZ. Plan for a full day if you're doing both. The EFI Live calibrations are transferred to the AutoCal interface and flashed through the OBD-II port. Every kit ships with detailed instructions, and we're available by phone if you need help during the install.
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The kit itself is very straightforward and everything fit well. You do need tuning to clear the check engine light, and the tune was provided quickly after ordering EFI Live. I chose to replace the up-pipe instead of blocking it off.
Power gains were noticeable immediately after install.
All components were included and built well. Would recommend.
From purchase through install, everything went smoothly. A minor issue was resolved quickly without hassle.
Installed the EGR delete and immediately noticed improved throttle response and smoother operation. Build quality is excellent.