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- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 9 - Jul 14
For Your Every Summer RSVP, with Code: SUMMER15
Description
Merchant Automotive 450400C Engine Gasket Set (With Head Gaskets)The Merchant Automotive 450400C Engine Gasket Set (With Head Gaskets) from GAP is what you need to rebuild your GM 6. 6L Diesel LML engine. When replacing blown head gaskets or rebuilding an LML Duramax diesel engine, you are going to need a large variety of gaskets and seals to get the job done. Merchant Automotive has put together this LML Duramax Diesel engine gasket kit to help you get the job done. Featuring OE style and upgraded parts, this kit
The Merchant Automotive 450400C Engine Gasket Set (With Head Gaskets) from GAP is what you need to rebuild your GM 6.6L Diesel LML engine. When replacing blown head gaskets or rebuilding an LML Duramax diesel engine, you are going to need a large variety of gaskets and seals to get the job done. Merchant Automotive has put together this LML Duramax Diesel engine gasket kit to help you get the job done. Featuring OE-style and upgraded parts, this kit will help ensure that your LML gaskets perform to OE spec.
Kit Includes:
Grade C Head Gaskets
(1) - Injector Copper, LLY LBZ LMM LML, 2004.5+, Pack of 8
(1) - LML Injector Body Seal, 2011+, 8 Pack, Duramax
(1) - LML Injector Fuel Return Line Seal, 2011-2016, 8 Pack, Duramax
(1) - EGR Coolant Pipe Drain Seal, LML LGH, 2011-2016 Duramax
(2) - Upper Valve Cover Gasket, LML LGH, 2011-2016 Duramax
(1) - PCV Valve Seal, LML, 2011 Duramax
(1) - Upper Bypass Pipe Seal at Thermostat Housing, LB7 LLY LBZ LMM LML LGH, 2001-2016 Duramax
(1) - Bypass Pipe Seal, LB7 LLY LBZ LMM LML, 2001-2016 Duramax
(2) - Oil Level Indicator Tube Seal, LB7 LLY LBZ LMM LML LGH, 2001-2016 Duramax
(2) - Gasket - Exhaust Manifold To Up Pipe, LB7 LLY LBZ LMM LML LGH, 2001-2016 Duramax
(2) - Gasket - Turbo To Up Pipe, LB7 LLY LBZ LMM LML LGH, 2001-2016 Duramax
(2) - Intake Y Bridge Gasket, LBZ LMM LML LGH, 2006-2016 Duramax
(1) - RTV Sealant, High Temp, Aluminum, 2.8oz LB7 LLY LBZ LMM LML, L5P 2001-2019 Duramax
(1) - Fuel Feed Pipe Gasket, LML LGH, 2011-2016 Duramax
(2) - Thermostat Housing Crossover At Head Gasket, LB7 LLY LBZ LMM LML LGH, 2001-2016 Duramax
(1) - Turbo Oil Feed Pipe Gasket, At Engine, LML LGH, 2011-2016 Duramax
(1) - Upper Intake Y Bridge Seal, LML, 2011-2016 Duramax
(1) - Turbo Mouthpiece Inlet Seal, LML LGH, 2011-2016 Duramax
(2) - EGR To Y Bridge Gasket, LML LGH, 2011-2016 Duramax
(1) - Oil Fill Tube Seal, LB7 LLY LBZ LMM LML, 2001-2016 Duramax
(2) - EGR Valve Gasket, LML LGH, 2011-2016 Duramax
(1) - Up Pipe To EGR Gasket, Cooler Bypass, LML, 2011-2016 Duramax
(1) - EGR Valve Cooler Gasket, LML, 2011-2016 Duramax
(1) - EGR Valve Gasket, Between EGR Cooler Assembly, LML, 2011-2016 Duramax
(1) - EGR Recirculation Pipe Gasket, LML, 2011-2016 Duramax
(2) - Exhaust Manifold Gasket, LB7 LLY LBZ LMM LML LGH, 2001-2016 Duramax
(2) - PCV Drain Ventilation Hose Fitting Seal, Hose Side And Block Side, LML LGH, 2011-2016 Duramax
(1) - Turbo Oil Return Pipe Gasket At Engine, LML LGH, 2011-2016 Duramax
(1) - PCV Oil Separator Seal, LML LGH, 2011-2016 Duramax
(2) - PCV Valve Seal, LML, 2012-2016, Turbo Resonator, LML, 2011-2016 Duramax
(2) - Lower Valve Cover Gasket LLY LBZ LMM LML
Kit Includes:
Grade C Head Gaskets
(1) - Injector Copper, LLY LBZ LMM LML, 2004.5+, Pack of 8
(1) - LML Injector Body Seal, 2011+, 8 Pack, Duramax
(1) - LML Injector Fuel Return Line Seal, 2011-2016, 8 Pack, Duramax
(1) - EGR Coolant Pipe Drain Seal, LML LGH, 2011-2016 Duramax
(2) - Upper Valve Cover Gasket, LML LGH, 2011-2016 Duramax
(1) - PCV Valve Seal, LML, 2011 Duramax
(1) - Upper Bypass Pipe Seal at Thermostat Housing, LB7 LLY LBZ LMM LML LGH, 2001-2016 Duramax
(1) - Bypass Pipe Seal, LB7 LLY LBZ LMM LML, 2001-2016 Duramax
(2) - Oil Level Indicator Tube Seal, LB7 LLY LBZ LMM LML LGH, 2001-2016 Duramax
(2) - Gasket - Exhaust Manifold To Up Pipe, LB7 LLY LBZ LMM LML LGH, 2001-2016 Duramax
(2) - Gasket - Turbo To Up Pipe, LB7 LLY LBZ LMM LML LGH, 2001-2016 Duramax
(2) - Intake Y Bridge Gasket, LBZ LMM LML LGH, 2006-2016 Duramax
(1) - RTV Sealant, High Temp, Aluminum, 2.8oz LB7 LLY LBZ LMM LML, L5P 2001-2019 Duramax
(1) - Fuel Feed Pipe Gasket, LML LGH, 2011-2016 Duramax
(2) - Thermostat Housing Crossover At Head Gasket, LB7 LLY LBZ LMM LML LGH, 2001-2016 Duramax
(1) - Turbo Oil Feed Pipe Gasket, At Engine, LML LGH, 2011-2016 Duramax
(1) - Upper Intake Y Bridge Seal, LML, 2011-2016 Duramax
(1) - Turbo Mouthpiece Inlet Seal, LML LGH, 2011-2016 Duramax
(2) - EGR To Y Bridge Gasket, LML LGH, 2011-2016 Duramax
(1) - Oil Fill Tube Seal, LB7 LLY LBZ LMM LML, 2001-2016 Duramax
(2) - EGR Valve Gasket, LML LGH, 2011-2016 Duramax
(1) - Up Pipe To EGR Gasket, Cooler Bypass, LML, 2011-2016 Duramax
(1) - EGR Valve Cooler Gasket, LML, 2011-2016 Duramax
(1) - EGR Valve Gasket, Between EGR Cooler Assembly, LML, 2011-2016 Duramax
(1) - EGR Recirculation Pipe Gasket, LML, 2011-2016 Duramax
(2) - Exhaust Manifold Gasket, LB7 LLY LBZ LMM LML LGH, 2001-2016 Duramax
(2) - PCV Drain Ventilation Hose Fitting Seal, Hose Side And Block Side, LML LGH, 2011-2016 Duramax
(1) - Turbo Oil Return Pipe Gasket At Engine, LML LGH, 2011-2016 Duramax
(1) - PCV Oil Separator Seal, LML LGH, 2011-2016 Duramax
(2) - PCV Valve Seal, LML, 2012-2016, Turbo Resonator, LML, 2011-2016 Duramax
(2) - Lower Valve Cover Gasket LLY LBZ LMM LML
WARRANTY INFO:
1 Year Limited
Note: Head Gaskets Included & Head Bolts NOT Included
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
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Product Reviews
★★★★★ 5
It's not easy to change the filter but I do it.
It works & helps save gas.
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Reviewed in the United States on February 22, 2025
★★★★★ 5
Great quality, price and fit!
Size: size for KONA/SOUL
Good quality and fit! Highly recommend
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Reviewed in the United States on May 19, 2026
★★★★★ 5
2022 Outback 2.5
Size: size for ASCENT/CROSSTREK/IMPREZA/LEGACY/OUTBACK
Fits with no issues
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Reviewed in the United States on May 18, 2026
★★★★★ 5
Perfect fit for 2018 grand touring
Size: size for 6 Turbo/CX5 Turbo
It fit perfectly in my 2018 Mazda 6 Grand Touring. I replaced both filters & had no issues installing them. They feel really well made. I could notice a difference in smell right away. It wasn’t bad, I just knew I had replaced them LOL. The value is great for what you get.
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Reviewed in the United States on September 23, 2025
★★★★★ 5
Good quality
Size: size for MDX/PASSPORT/PILOT/RIDGELINE
Great buy . Easy to change out and saved $60.00 by not having the dealership do it.
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Reviewed in the United States on March 10, 2026