Product Description
FLEECE FPE-61-10003-D 2006-2010 FACTORY LBZ/LMM DURAMAX CYLINDER HEAD (DRIVER SIDE)
Restore factory performance and reliability to your 2006–2010 LBZ/LMM 6.6L Duramax with the FLEECE FPE-61-10003-D Factory LBZ/LMM Cylinder Head (Driver Side). Built by Fleece Performance Engineering’s Freedom Racing Engine division, this brand-new casting is fully machined, assembled, and pressure-tested to meet or exceed GM specifications. It arrives ready to bolt on with new valve guides, springs, and seals, making it the ideal solution for cracked heads, failed valves, overheating, or high-mileage rebuilds.
Key Features
- New casting – not re-welded or refurbished, built for long-term durability.
- All-new valve guides, springs, and seals for a complete top-end refresh.
- Pressure & leak tested in a controlled engine-building environment.
- Precision-machined valves with 45-degree seat angles for clean sealing.
- Multi-angle valve job enhances airflow and combustion stability.
- No core charge – skip the hassle of returning your old head.
- Perfect for stock, towing, and daily-driven LBZ/LMM Duramax trucks.
Fitment
Engine: 6.6L Duramax LBZ/LMM (Driver Side)
- 2006 Chevrolet Silverado 2500HD / 3500HD 6.6L LBZ
- 2007 Chevrolet Silverado 2500HD / 3500HD 6.6L LBZ
- 2007.5–2010 Chevrolet Silverado 2500HD / 3500HD 6.6L LMM
- 2006 GMC Sierra 2500HD / 3500HD 6.6L LBZ
- 2007 GMC Sierra 2500HD / 3500HD 6.6L LBZ
- 2007.5–2010 GMC Sierra 2500HD / 3500HD 6.6L LMM
Cross-Reference & Related Fleece Products (CPP Diesel)
- Match this driver-side head with the passenger-side LBZ/LMM head: FLEECE FPE-61-10003-P 2006-2010 FACTORY LBZ/LMM DURAMAX CYLINDER HEAD (PASSENGER SIDE)
- Upgrade to LML heads (2011–2016 generation): FLEECE FPE-61-10004-D 2011-2016 LML DRIVER SIDE
- For L5P builds (2017–2023): FLEECE FPE-61-10014-D FREEDOM SERIES L5P DRIVER SIDE
OEM Interchange / Replacement Numbers
- GM 98062451
- GM 98062391
- GM 98068968
Why Choose Fleece Freedom Series?
Fleece’s Freedom Series heads are built to outperform typical rebuilt units. Every casting is inspected, machined, assembled, and fully pressure-tested. If you want OEM-plus reliability with zero core charge and top-tier machine work, this is the LBZ/LMM head to choose.
Specifications for FLEECE FPE-61-10003-D
| Attribute | Value |
|---|---|
| Brand | Fleece Performance Engineering |
| Part Number | FPE-61-10003-D |
| Engine Compatibility | 2006–2010 LBZ/LMM 6.6L Duramax (Driver Side) |
| UPC | 670875716636 |
| GTIN | 670875716636 |
| Shipping Weight | Approx. 45 lbs |
| Shipping Dimensions | 23” x 15” x 12” |
| Core Charge | None |
| OE Cross Reference | 98062451, 98062391, 98068968 |
| E-Codes | Not applicable |
| Prop 65 | WARNING: Cancer & Reproductive Harm – www.P65Warnings.ca.gov |
FAQ
Is this a brand-new casting or a remanufactured head?
This is a brand-new casting, fully machined and assembled by Fleece. It is not refurbished or re-welded.
Does this fit both LBZ and LMM Duramax engines?
Yes. This head fits all 2006–2007 LBZ and 2007.5–2010 LMM 6.6L Duramax engines on the driver side.
Is there a core charge?
No. Fleece sells this head with no core charge, so you can keep or scrap your old head.
Should I install both cylinder heads at the same time?
It’s recommended for high-mileage or overheating cases. Pair this with the passenger-side head: FLEECE FPE-61-10003-P .
Do I need custom tuning after installation?
No tuning is required for stock replacement use. Modified engines may benefit from custom tuning.
