Collection: 2004.5-2005 6.6L LLY Duramax Engine Parts & Accessories
2004.5-2005 6.6L LLY Duramax Engine Parts & Accessories
Maximize the performance and longevity of your 2004.5-2005 6.6L LLY Duramax with high-quality engine components designed for durability and enhanced performance. Whether you’re upgrading for increased horsepower, improved fuel efficiency, or better overall engine reliability, our selection of...
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Fleece Performance '-6 90 Deg to Hose Barb Black FPE-PL-90-06
Regular price $12.99 USDSale price $12.99 USD Regular priceUnit price / per -
Fleece Performance '-8 90 Degree to Hose Barb Black FPE-PL-90-08
Regular price $13.99 USDSale price $13.99 USD Regular priceUnit price / per -
Fleece Performance 2004.5-2010 Duramax Billet Turbo Resonator Delete Plug LLY/LBZ/LMM FPE-RES-04.5-10
Regular price $23.80 USDSale price $23.80 USD Regular priceUnit price / per -
Fleece Performance Duramax Turbo Thermostat Delete Plug FPE-TURBO-THERM
Regular price $39.85 USDSale price $39.85 USD Regular priceUnit price / per -
Fleece Performance FPE-PL-45-06 6AN 45-Degree to Hose Barb – Black
Regular price $12.99 USDSale price $12.99 USD Regular priceUnit price / per -
Fleece Performance '-8 45 Degree to Hose Barb Black FPE-PL-45-08
Regular price $12.99 USDSale price $12.99 USD Regular priceUnit price / per -
Fleece Performance -10 90 Deg to Hose Barb Black FPE-PL-90-10
Regular price $14.99 USDSale price $14.99 USD Regular priceUnit price / per -
Fleece Performance 9/16 Inch -18 Hex Socket Plug w/ O-Ring FPE-SP-91618
Regular price $4.49 USDSale price $4.49 USD Regular priceUnit price / per -
Fleece Performance 3/14 Inch-16 Hex Socket Plug w/ O-Ring FPE-SP-3416
Regular price $4.99 USDSale price $4.99 USD Regular priceUnit price / per -
Fleece Performance 7/8 Inch -14 Hex Socket Plug w/ O-Ring FPE-SP-7814
Regular price $5.99 USDSale price $5.99 USD Regular priceUnit price / per -
Fleece Performance FPE-34805-A 10 AN to 7/8-14 Straight Male Adapter – Black (Without O-Ring)
Regular price $14.96 USDSale price $14.96 USD Regular priceUnit price / per -
Fleece Performance 12mm Quick Connect to 3/4 Inch-16 O-ring (-8 AN) FPE-34550-A
Regular price $15.99 USDSale price $15.99 USD Regular priceUnit price / per -
Fleece Performance 5/16 Inch Quick Connect to 3/4 Inch-16 O-ring (-8 AN) FPE-34552-A
Regular price $11.99 USDSale price $11.99 USD Regular priceUnit price / per -
Fleece Performance 1/2 Inch Hose Barb to 3/4 Inch-16 O-ring (-8 AN) FPE-34553-A
Regular price $10.99 USDSale price $10.99 USD Regular priceUnit price / per -
Fleece Performance 5/8 Inch Hose Barb to 3/4 Inch-16 O-ring (-8 AN) FPE-34554-A
Regular price $12.99 USDSale price $12.99 USD Regular priceUnit price / per -
Fleece Performance 1/2 Inch Quick Connect to 3/4 Inch-16 O-ring (-8 AN) FPE-34900-A
Regular price $16.99 USDSale price $16.99 USD Regular priceUnit price / per -
Fleece Performance 2001-2016 Duramax Oil Cap Black FPE-DMAX-OC-BLK
Regular price $39.99 USDSale price $39.99 USD Regular priceUnit price / per -
Fleece Performance 2001-2016 Duramax Oil Cap Blue FPE-DMAX-OC-BLU
Regular price $39.99 USDSale price $39.99 USD Regular priceUnit price / per -
Fleece Performance 2001-2016 Duramax Oil Cap Red FPE-DMAX-OC-RED
Regular price $39.99 USDSale price $39.99 USD Regular priceUnit price / per -
Fleece Performance 6.6L Duramax Stage 2 Pushrods, 0.875 inch dia FPE-DUR-S2-PROD
Regular price $490.19 USDSale price $490.19 USD Regular priceUnit price / per -
Fleece Performance 1/2 Inch CP3 Feed Fitting FPE-CP3-FEED
Regular price $15.95 USDSale price $15.95 USD Regular priceUnit price / per -
Fleece Performance FPE-AN971-10DRD 10AN Aluminum Male Weld Bung – 5/8" Register, 7/8" OD
Regular price $8.35 USDSale price $8.35 USD Regular priceUnit price / per -
MAHLE Right Bank Piston for 2001-2005 GM 6.6L LB7 Duramax
Regular price $456.46 USDSale price $456.46 USD Regular priceUnit price / per -
MAHLE 224-3451 Left Bank Piston for 2001-2005 GM 6.6L LB7 Duramax
Regular price $456.46 USDSale price $456.46 USD Regular priceUnit price / per -
MAHLE 41909 Complete Piston Ring Set (Standard) for Chevy/GMC 6.6L Duramax Engines 2001-2010
Regular price $230.47 USDSale price $230.47 USD Regular priceUnit price / per -
Vibrant Performance Gen3 Catch Can Assembly
Regular price $323.99 USDSale price $323.99 USD Regular priceUnit price / per -
PPE 2001-2016 GM 6.6L Duramax Straight Valve Springs, Retainers, and Keepers Kit
Regular price $539.99 USDSale price $539.99 USD Regular priceUnit price / per -
PPE 2001-2016 GM 6.6L Duramax Valve and Spring Kit
Regular price $809.99 USDSale price $809.99 USD Regular priceUnit price / per
2004.5-2005 6.6L LLY Duramax Engine Parts & Accessories
Maximize the performance and longevity of your 2004.5-2005 6.6L LLY Duramax with high-quality engine components designed for durability and enhanced performance. Whether you’re upgrading for increased horsepower, improved fuel efficiency, or better overall engine reliability, our selection of engine parts has everything you need. From intake manifolds to camshafts and gaskets, each part is engineered to deliver exceptional performance and reliability. Shop 2004.5-2005 6.6L LLY Duramax Engine Parts & Accessories
High-Performance Engine Parts for 6.6L LLY Duramax
Our engine components for the 2004.5-2005 6.6L LLY Duramax are built to withstand high power outputs and demanding driving conditions. From replacement parts to performance upgrades, our products are designed to optimize engine efficiency, improve combustion, and increase power. These parts are essential for anyone looking to maintain or enhance the performance of their Duramax engine.
Why Choose Our Engine Components?
Upgrading your engine components is a great way to unlock your truck’s full potential. Whether you're adding power, improving fuel economy, or boosting overall performance, our parts are engineered for longevity and optimal performance. Designed for Duramax owners who demand the best, these components provide exceptional reliability and performance.
Key Features:
- Enhanced Power & Efficiency: Improves horsepower, torque, and overall engine efficiency.
- Durability: Built to withstand high temperatures and demanding conditions.
- Improved Performance: Optimizes engine operation for better throttle response and overall driving experience.





