Product Description
FLEECE FPE-61-10004-P 2011-2016 FACTORY LML DURAMAX CYLINDER HEAD (PASSENGER SIDE)
Give your 2011-2016 6.6L LML Duramax fresh life with the FLEECE FPE-61-10004-P Factory LML Duramax Cylinder Head (Passenger Side). Built in Fleece Performance Engineering’s Freedom Racing Engine facility, this Freedom Series cylinder head is designed to meet or exceed OEM specifications while delivering the reliability, sealing, and airflow your Silverado or Sierra needs for towing, daily driving, and work duty.
This head uses a new casting, is thoroughly cleaned, machined, and pressure & leak tested, then assembled with brand-new valve guides, valve springs, and valve seals so it is ready to bolt on with no core charge. Stock-style valves with a 45-degree seat and a multi-angle valve job help restore compression and improve combustion efficiency, giving you smooth idle, strong off-idle torque, and long-term durability.
Key Features:
- New casting Freedom Series cylinder head for 2011-2016 6.6L LML Duramax
- Passenger-side head engineered to meet or exceed factory specifications
- New valve guides, valve springs, and valve seals installed
- Precision ground stock valves with 45-degree intake and exhaust seats
- Multi-angle valve job for improved sealing, airflow, and efficiency
- Every head is cleaned, decked, and pressure & leak tested
- Perfect for towing, daily driving, and work-truck applications
- No core charge – keep your old head and avoid return hassles
- Backed by a 1 Year Limited Parts Warranty
Fitment
Engine: 6.6L Duramax LML
Model Years: 2011, 2012, 2013, 2014, 2015, 2016
Position: Passenger Side (Right)
- 2011-2016 Chevrolet Silverado 2500HD 6.6L LML Duramax
- 2011-2016 Chevrolet Silverado 3500HD 6.6L LML Duramax
- 2011-2016 GMC Sierra 2500HD 6.6L LML Duramax
- 2011-2016 GMC Sierra 3500HD 6.6L LML Duramax
Note: This listing is for one passenger-side cylinder head. For a complete pair on LML applications, add the matching driver-side head below.
Recommended Fleece Cross-Reference / Related Parts
- Driver-side LML cylinder head (matching pair): FLEECE FPE-61-10004-D 2011-2016 FACTORY LML DURAMAX CYLINDER HEAD (DRIVER SIDE)
- LBZ/LMM factory passenger cylinder head (2006-2010): FLEECE FPE-61-10003-P 2006-2010 FACTORY LBZ/LMM DURAMAX CYLINDER HEAD (PASSENGER SIDE)
- LBZ/LMM factory driver cylinder head (2006-2010): FLEECE FPE-61-10003-D 2006-2010 FACTORY LBZ/LMM DURAMAX CYLINDER HEAD (DRIVER SIDE)
- L5P Freedom Series driver-side head (2017-2023): FLEECE FPE-61-10014-D FREEDOM SERIES DURAMAX CYLINDER HEAD FOR 17-23 L5P (DRIVER SIDE)
Why Choose Fleece Freedom Series for Your LML?
Fleece’s Freedom Series heads are designed to handle the real-world abuse that LML trucks see every day—heavy trailers, big mileage, and long grades. Each unit is built in a dedicated engine facility, pressure & leak tested, and assembled with new valvetrain components to help minimize downtime and reduce the chance of repeat failures. Combined with quality gaskets, head studs, and proper tuning, this passenger-side head is a solid foundation for a reliable 6.6L Duramax build.
Installation Notes
- Use new head bolts or head studs and follow OEM torque sequence and specs.
- Always pair with quality head gaskets specifically for LML 6.6L applications.
- Verify cylinder head surfaces and block deck cleanliness before installation.
- Professional installation is strongly recommended on modern common-rail diesels.
Specifications for FLEECE FPE-61-10004-P
| Attribute | Value |
|---|---|
| Brand | Fleece Performance Engineering |
| Part Number | FPE-61-10004-P |
| Engine | 6.6L Duramax LML (2011-2016) |
| Position | Passenger Side (Right) |
| UPC | 670875716650 |
| GTIN | 670875716650 |
| Series | Freedom Series Cylinder Head |
| Casting | New casting, remanufactured & machined to OEM spec |
| Valvetrain | New valve guides, valve springs, and valve seals; stock-style valves with 45° seats |
| Testing | Cleaned, decked, pressure & leak tested |
| Core Charge | No core charge required |
| Shipping Info | Approx. 45 lb ship weight; boxed dimensions about 23" x 15" x 12"; free ground shipping from CPP Diesel |
| Cross Reference | Fleece FPE-61-10004-D (LML driver side), FPE-61-10003-P/D (LBZ/LMM heads), FPE-61-10014-D (L5P head – driver side) |
| E-Codes | Not applicable for this component |
| Prop 65 | WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
| Warranty | 1 Year Limited Parts Warranty |
FAQ
Is this Fleece FPE-61-10004-P cylinder head a direct replacement for my stock LML passenger head?
Yes. This passenger-side cylinder head is built as a direct replacement for the factory LML 6.6L Duramax head on 2011-2016 Silverado and Sierra HD trucks. It is machined to OEM dimensions and is compatible with stock-style hardware, gaskets, and manifolds when installed correctly.
Do I need to send in my old cylinder head as a core?
No. One of the biggest advantages of this Freedom Series head is that there is no core charge. You can keep your old head for a spare, for porting, or as a mock-up piece without worrying about core returns.
Should I replace both cylinder heads on my LML at the same time?
It is not strictly required, but many owners choose to replace both heads when dealing with high mileage, overheating, or head gasket failures. Matching this passenger-side head with the driver-side FLEECE FPE-61-10004-D ensures both sides have fresh castings, new valvetrain components, and consistent machining.
What supporting parts are recommended with this cylinder head?
At a minimum, plan on new OEM-grade head gaskets, new head bolts or head studs, and fresh coolant. Many Duramax owners also upgrade to performance head studs, replace glow plugs, and inspect injectors and injector cups while the heads are off for maximum reliability.
Can this head support towing and mild performance upgrades?
Yes. This Fleece Freedom Series head is ideal for daily-driven trucks and hard-working tow rigs, and it pairs well with common upgrades such as tuning, exhaust, and intake improvements. As with any performance build, ensure tuning and boost levels remain within safe limits for your combination.
