SKU: FPE-61-10014-P / UPC: 732777408924
Fleece Performance Freedom Series Cylinder Head (Passenger Side) for 2017-2023 GM 6.6L Duramax L5P
Revitalize your 2017-2023 GM 6.6L Duramax L5P with the Fleece Performance Freedom Series Passenger Side Cylinder Head. Engineered for performance, reliability, and precision, this cylinder head is the ideal choice for diesel enthusiasts seeking a high-quality replacement that delivers consistent power for daily driving, towing, or heavy-duty applications. Crafted in Fleece Performance’s state-of-the-art Freedom Racing Engine shop, this cylinder head ensures your Duramax performs at its best, offering unmatched quality and durability.
Why Choose the Fleece?
This passenger-side cylinder head is meticulously remanufactured from OE castings to meet or exceed factory specifications, providing a seamless fit and dependable performance. Designed specifically for the 2017-2023 GM 6.6L Duramax L5P, it enhances airflow for improved combustion, delivering the power and efficiency your truck needs. Each head undergoes rigorous inspection, pressure testing, and leak testing to guarantee reliability, making it a trusted solution for Chevrolet Silverado and GMC Sierra owners looking to restore or enhance their vehicle’s performance.
Key Features and Benefits
- Precision Engineering: Manufactured in Fleece’s Freedom Racing Engine shop, ensuring exacting standards and quality control.
- Enhanced Airflow: Improves combustion efficiency, boosting power output for towing, hauling, or daily driving.
- Comprehensive Testing: Each head is inspected, pressure tested, and leak tested for maximum reliability.
- Brand-New Components: Includes new valves, valve guides, springs, and valve seals for long-lasting performance.
- No Core Charge: Hassle-free purchase with no core return required, simplifying the upgrade process.
- Ready for Installation: Cleaned, decked, and prepped for a straightforward bolt-on installation.
What’s Included in Your Purchase
- Fleece Performance Freedom Series Cylinder Head (Passenger Side) – SKU: FPE-61-10014-P, UPC: 732777408924
- New Valves: Precision-installed for optimal sealing and performance.
- New Valve Guides: Ensure accurate valve movement and durability.
- New Valve Springs: Designed for consistent pressure and reliability.
- New Valve Seals: Prevent oil leaks and maintain engine efficiency.
-
Shipping Details:
- Weight: 45.00 lbs
- Dimensions: 23 in. (L) x 15 in. (W) x 12 in. (H)
Note: Head gasket not included. For optimal performance, we recommend using a high-quality head gasket, such as Mahle 54774 or Cummins 4932210.
Vehicle Fitment
The Fleece Performance Freedom Series Cylinder Head (Passenger Side) is designed for the following vehicles with a single alternator configuration:
- 2017-2021 Chevrolet Silverado 2500HD/3500HD – 6.6L Duramax L5P
- 2017-2021 GMC Sierra 2500HD/3500HD – 6.6L Duramax L5P
Fitment Note: Verify compatibility based on your vehicle’s model, trim, build date, and factory options, as these may affect fitment. This cylinder head is compatible with single alternator setups only.
Installation and Compatibility
Built for easy installation, this cylinder head is a direct replacement for the factory passenger-side head on your 6.6L Duramax L5P. It’s ideal for daily drivers, work trucks, or performance builds, with a design that supports up to 700 horsepower in street applications. For engines exceeding factory RPM limits, consider Fleece’s Performance Series heads with higher valve spring rates. Always follow installation instructions and adjust valve lash properly to prevent damage.
Engine
Engine parts and engine bay upgrades for Dodge, Jeep, RAM, Chrysler, Chevrolet, Ford, Toyota, Nissan, Subaru, and Honda vehicles are stocked at Black Ops Auto Works. Shop oil catch cans, supercharger pulleys, thermostats, radiators, cooling parts, throttle bodies, intake manifolds, headers, ignition coils, spark plugs, sensors, gaskets, fuel pumps, valve covers, engine covers, billet cap covers, and full engine bay dress-up parts for HEMI, Hellcat, Trackhawk, Redeye, Demon, Scat Pack, RAM TRX, LS, LT, Coyote, EcoBoost, K-Series, and 2JZ builds. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 14,298 engine SKUs across performance, cooling, oil control, ignition, and appearance categories. What This Category Covers The Engine collection combines OEM-replacement engine service parts with performance aftermarket upgrades for supercharged, turbocharged, and naturally aspirated builds...
View Engine Products
Fleece Performance
Fleece Performance diesel parts for Ford Power Stroke, Ram Cummins, and Chevrolet/GMC Duramax trucks are stocked at Black Ops Auto Works. Shop Cheetah turbochargers, TurboBrake exhaust brakes, CP3 and CP4 fuel pump upgrades, fuel filter assemblies, coolant tanks, head gasket sets, and sensor pigtails for LB7, LLY, LBZ, LMM, LML, and L5P Duramax engines and 5.9L and 6.7L Cummins engines. Every product is filterable by year, make, model, and engine generation so the correct part ships the first time. Black Ops Auto Works carries 333 Fleece Performance SKUs across turbochargers, fuel systems, cooling, and gaskets. What This Collection Covers Fleece Performance Engineering builds its catalog around the Duramax and Cummins common rail diesel platforms that dominate the high horsepower diesel truck community. Founded by brothers Brayden and Chase Fleece in a rural Indiana pole barn, the company grew into a technology leader in common rail injection systems, developing the Cheetah turb...
View Fleece Performance Products
Head Components
Cylinder head components and engine internals for performance builds and OE service are stocked at Black Ops Auto Works. Shop complete cylinder heads, head gaskets, head stud and bolt kits, rocker arms, lifters, camshaft and lifter kits, rotating assemblies, and main stud and bolt kits for LS, LT, HEMI 5.7/6.1/6.4, Coyote, Cummins, Powerstroke, VW/Audi turbo, Subaru, Nissan, and import platforms. Every product is filterable by year, make, model, trim, engine, and drivetrain so the correct part ships the first time. Black Ops Auto Works carries 972 Head Components SKUs across component type, engine platform, and bore or gasket specification. What This Collection Covers Head Components groups together the parts that live at and around the cylinder head, the area of the engine most affected by heat, combustion pressure, and clamping load. This includes complete heads, head gaskets, head studs and bolts, rocker arms, lifters, camshaft and lifter kits, main stud and bolt kits, and ro...
View Head Components Products
Heads
This collection covers cylinder head components including head gaskets, head studs, and complete head assemblies for performance engine builds and high-output applications, serving vehicle owners and builders who need reliable components for maintenance, restoration, or performance enhancement. Arp head studs, cometic head gaskets, and edelbrock or afr cylinder heads are foundational brands in performance cylinder head work, providing buyers with the confidence that comes from sourcing from recognized suppliers with documented fitment data. Proper head bolt torque sequence and head gasket compression thickness selection directly affect combustion sealing integrity and engine longevity, and selecting the correct specification for the specific application is the most important step before any installation. Whether the goal is restoring OEM function, addressing a worn component, or improving beyond factory performance, this collection addresses each need with confirmed-fit parts. Popul...
View Heads Products


