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 Adapter Fitting -10AN Male to 1.325 Inch Bore FPE-34224-B
Regular price $35.65 USDSale price $35.65 USD Regular priceUnit price / per -
Fleece Performance M22x1.5 to -10AN Male/Male Aluminum FPE-34578-A
Regular price $13.99 USDSale price $13.99 USD Regular priceUnit price / per -
Fleece Performance FPE-34873-A 8 AN to 3/4-16 Straight Male Adapter – Black (Without O-Ring)
Regular price $14.96 USDSale price $14.96 USD Regular priceUnit price / per -
Fleece Performance 1/2 Inch NPT to -10AN Male FPE-34874-A
Regular price $10.95 USDSale price $10.95 USD Regular priceUnit price / per -
Fleece Performance Turbo Drain Adapter FPE-78-14-TDA
Regular price $12.95 USDSale price $12.95 USD Regular priceUnit price / per -
Fleece Performance Universal 45 Degreeree Turbo Drain Nipple with O-ring FPE-78HS-45-TDA
Regular price $34.99 USDSale price $34.99 USD Regular priceUnit price / per -
Fleece Performance '-6 to 9/16 inch-18 Straight Male Black Fleece Performance w/ O-Ring FPE-APT-916-06
Regular price $10.99 USDSale price $10.99 USD Regular priceUnit price / per -
Fleece Performance GM Duramax Oil Cooler Adapter Kit FPE-DMAX-OCADPT
Regular price $99.00 USDSale price $99.00 USD Regular priceUnit price / per -
Fleece Performance 3/8 Inch Black Anodized Aluminum Y Barbed Fitting (For -6 Pushlock Hose) FPE-FIT-Y06-BLK
Regular price $23.99 USDSale price $23.99 USD Regular priceUnit price / per -
Fleece Performance 1/2 Inch Black Anodized Aluminum Y Barbed Fitting (For -8 Pushlock Hose) FPE-FIT-Y08-BLK
Regular price $24.99 USDSale price $24.99 USD Regular priceUnit price / per -
Fleece Performance 2001-2016 GM Fuel Primer Bulb Sealing Kit 2001-2016 GM 2500/3500 FPE-GM-FFPD-0116
Regular price $49.99 USDSale price $49.99 USD Regular priceUnit price / per -
Fleece Performance CP3 Regulator Extension Harness for 11-16 6.6L Duramax Fleece FPE-HAR-CP3-EXT
Regular price $29.99 USDSale price $29.99 USD Regular priceUnit price / per -
Fleece Performance Duramax MAP/BARO Sensor Pigtail 01-07 FPE-HAR-DMAX-MAP-0107
Regular price $27.99 USDSale price $27.99 USD Regular priceUnit price / per -
Fleece Performance Duramax Oil Pressure Sensor Pigtail LB7 FPE-HAR-DMAX-OP-0102
Regular price $19.94 USDSale price $19.94 USD Regular priceUnit price / per -
Fleece Performance Duramax Vane Position Sensor Pigtail LLY FPE-HAR-DMAX-VPS-0405
Regular price $29.99 USDSale price $29.99 USD Regular priceUnit price / per -
Fleece Performance Turbo Vane Position Sensor Adapter Harness for LLY Duramax FPE-HAR-DMAX-VPS-ADPT
Regular price $46.99 USDSale price $46.99 USD Regular priceUnit price / per -
Fleece Performance Fuel Pressure Regulator and Multiuse Pigtail FPE-HAR-FPR-PT
Regular price $27.99 USDSale price $27.99 USD Regular priceUnit price / per -
Fleece Performance Multiuse Sensor 6 Inch Pigtail FPE-HAR-MU-PT-5
Regular price $19.99 USDSale price $19.99 USD Regular priceUnit price / per -
Fleece Performance Multiuse Pressure Sensor 36 Inch Pigtail FPE-HAR-MU-PT-6
Regular price $24.99 USDSale price $24.99 USD Regular priceUnit price / per -
Fleece Performance Multi-Use Sensor Pigtail - No 8 FPE-HAR-MU-PT-8
Regular price $14.99 USDSale price $14.99 USD Regular priceUnit price / per -
Fleece Performance 18 Inch Rail Pressure Sensor Extension Harness FPE-HAR-RP-EXT
Regular price $43.04 USDSale price $43.04 USD Regular priceUnit price / per -
Fleece Performance 1/2 Inch NPT Hex Socket Plug Black FPE-NPT-12
Regular price $4.49 USDSale price $4.49 USD Regular priceUnit price / per -
Fleece Performance 1/4 Inch NPT Hex Socket Plug Black FPE-NPT-14
Regular price $2.99 USDSale price $2.99 USD Regular priceUnit price / per -
Fleece Performance 1/8 Inch NPT Hex Socket Plug Black FPE-NPT-18
Regular price $2.99 USDSale price $2.99 USD Regular priceUnit price / per -
Fleece Performance 3/4 Inch NPT Hex Socket Plug Black FPE-NPT-34
Regular price $4.99 USDSale price $4.99 USD Regular priceUnit price / per -
Fleece Performance 3/8 Inch NPT Hex Socket Plug Black FPE-NPT-38
Regular price $2.99 USDSale price $2.99 USD Regular priceUnit price / per -
Fleece Performance '-6 AN Straight to Hose Barb FPE-PL-00-06
Regular price $6.99 USDSale price $6.99 USD Regular priceUnit price / per -
Fleece Performance '-8 Straight to Hose Barb Black FPE-PL-00-08
Regular price $7.99 USDSale price $7.99 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.



























