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Part: FPE-61-10003-D

Introducing our Freedom Series cylinder heads for the 6.6L Duramax! Each cylinder head is manufactured in our state-of-the-art Freedom Racing Engine shop and is guaranteed to meet or exceed factory specifications.

All heads are meticulously inspected, pressure and leak tested, and are equipped with new valve guides, springs, and valve seals. Perfect for the daily driver or towing application, these heads utilize stock valves with a 45 degree angle on the intake and exhaust ports. Now available with no core charge!

Features:

  • New valve guides, new springs, and new valve seals
  • Pressure and leak tested
  • Precision ground stock valves with a 45 degree angle
  • Multi-angle valve job

Warranty:

  • 1 Year Limited Parts Warranty

 

2006,2006,Chevrolet,Silverado 3500,LS|2006,2010,Chevrolet,Silverado 2500 HD,WT|2006,2010,GMC,Sierra 2500 HD,SLT|2006,2006,Chevrolet,Silverado 2500 HD,LS|2006,2006,GMC,Sierra 3500,WT|2006,2006,GMC,Sierra 3500,SLE|2006,2010,GMC,Sierra 2500 HD,SLE|2006,2006,Chevrolet,Silverado 3500,WT|2006,2006,GMC,Sierra 3500,SL|2006,2006,GMC,Sierra 2500 HD,SL|2006,2010,GMC,Sierra 2500 HD,WT|2006,2010,Chevrolet,Silverado 2500 HD,LT|2006,2006,Chevrolet,Silverado 3500,LT|2006,2006,GMC,Sierra 3500,SLT|2007,2010,GMC,Sierra 3500 HD,SLT|2007,2010,GMC,Sierra 3500 HD,WT|2007,2007,GMC,Sierra 2500 HD Classic,WT|2007,2007,Chevrolet,Silverado 2500 HD Classic,WT|2007,2007,GMC,Sierra 3500 Classic,SLT|2007,2007,GMC,Sierra 3500 Classic,WT|2007,2007,GMC,Sierra 2500 HD Classic,SLE|2007,2007,GMC,Sierra 2500 HD Classic,SLT|2007,2010,GMC,Sierra 3500 HD,SLE|2007,2007,GMC,Sierra 3500 Classic,SLE|2007,2007,GMC,Sierra 2500 HD Classic,SL|2007,2007,GMC,Sierra 3500 Classic,SL|2007,2010,Chevrolet,Silverado 2500 HD,LTZ|2007,2007,Chevrolet,Silverado 2500 HD Classic,LT|2007,2007,Chevrolet,Silverado 3500 Classic,LT|2007,2007,Chevrolet,Silverado 3500 Classic,LS|2007,2007,Chevrolet,Silverado 2500 HD Classic,LS|2007,2007,Chevrolet,Silverado 3500 Classic,WT

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Part: FPE-61-10003-P

Introducing our Freedom Series cylinder heads for the 6.6L Duramax! Each cylinder head is manufactured in our state-of-the-art Freedom Racing Engine shop and is guaranteed to meet or exceed factory specifications.

All heads are meticulously inspected, pressure and leak tested, and are equipped with new valve guides, springs, and valve seals. Perfect for the daily driver or towing application, these heads utilize stock valves with a 45 degree angle on the intake and exhaust ports. Now available with no core charge!

Features:

  • New valve guides, new springs, and new valve seals
  • Pressure and leak tested
  • Precision ground stock valves with a 45 degree angle
  • Multi-angle valve job

Warranty:

  • 1 Year Limited Parts Warranty

 

2006,2006,Chevrolet,Silverado 3500,LS|2006,2010,Chevrolet,Silverado 2500 HD,WT|2006,2010,GMC,Sierra 2500 HD,SLT|2006,2006,Chevrolet,Silverado 2500 HD,LS|2006,2006,GMC,Sierra 3500,WT|2006,2006,GMC,Sierra 3500,SLE|2006,2010,GMC,Sierra 2500 HD,SLE|2006,2006,Chevrolet,Silverado 3500,WT|2006,2006,GMC,Sierra 3500,SL|2006,2006,GMC,Sierra 2500 HD,SL|2006,2010,GMC,Sierra 2500 HD,WT|2006,2010,Chevrolet,Silverado 2500 HD,LT|2006,2006,Chevrolet,Silverado 3500,LT|2006,2006,GMC,Sierra 3500,SLT|2007,2010,GMC,Sierra 3500 HD,SLT|2007,2010,GMC,Sierra 3500 HD,WT|2007,2007,GMC,Sierra 2500 HD Classic,WT|2007,2007,Chevrolet,Silverado 2500 HD Classic,WT|2007,2007,GMC,Sierra 3500 Classic,SLT|2007,2007,GMC,Sierra 3500 Classic,WT|2007,2007,GMC,Sierra 2500 HD Classic,SLE|2007,2007,GMC,Sierra 2500 HD Classic,SLT|2007,2010,GMC,Sierra 3500 HD,SLE|2007,2007,GMC,Sierra 3500 Classic,SLE|2007,2007,GMC,Sierra 2500 HD Classic,SL|2007,2007,GMC,Sierra 3500 Classic,SL|2007,2010,Chevrolet,Silverado 2500 HD,LTZ|2007,2007,Chevrolet,Silverado 2500 HD Classic,LT|2007,2007,Chevrolet,Silverado 3500 Classic,LT|2007,2007,Chevrolet,Silverado 3500 Classic,LS|2007,2007,Chevrolet,Silverado 2500 HD Classic,LS|2007,2007,Chevrolet,Silverado 3500 Classic,WT

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Fleece Factory LML Duramax Cylinder Head – Driver Side | 2011-2016 Silverado/Sierra 2500/3500

Built for performance, reliability, and OEM fitment, the Fleece Freedom Series driver-side cylinder head is the ideal choice for your 6.6 L LML Duramax rebuild or top-end refresh. Machined and assembled at Fleece’s Freedom Racing Engine facility, each unit is pressure and leak tested, precision machined, and fully assembled with all-new components-no core required.

Key Features

  • New valve guides, seals, and springs pre-installed for a ready-to-run assembly.
  • Precision-ground stock-style valves with a 45° seat and multi-angle valve job for factory-like flow.
  • Pressure & leak tested for guaranteed integrity at operating temps and pressures.
  • No core charge-you keep your original head, no return required.
  • Made in the USA and backed by Fleece’s 1-year limited parts warranty.

What’s Included

  • Fully assembled driver-side cylinder head (ready to install)
  • Factory-style injector cups installed
  • Machined deck surface and valve seats
  • Installation guide

Vehicle Fitment

Fits all 2011-2016 Chevrolet Silverado and GMC Sierra 2500/3500 HD 6.6 L LML Duramax engines, including trims like WT, LT, LTZ, High Country, SLE, SLT, and Denali. Works with both 2WD and 4WD configurations.

Technical Specs

Part Number FPE-61-10004-D (Driver Side)
Material Cast Aluminum
Valve Type Stock-style, 45° intake & exhaust
Testing Pressure & Leak Tested
Warranty 1-Year Limited

Recommended Companion Parts

  • FPE-61-10004-P – Passenger-Side Freedom Series Cylinder Head for a matched pair.
  • GM 12637785 – Grade C MLS Head Gasket (Driver Side).
  • ARP 230-4201 – ARP 2000 Head Stud Kit for increased clamping force and long-term durability.
  • FPE-34563 / FPE-34564 – PowerFlo In-Tank Lift Pumps for improved fuel delivery during top-end rebuilds (short-bed / long-bed).

Installation Notes

Always verify engine block deck surface for flatness before installation. Use new Grade C MLS head gaskets and ARP head studs for best results. Follow factory torque spec and sequence if reusing OEM bolts.

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Fleece Factory LML Duramax Cylinder Head – Passenger Side | 2011‑2016 Silverado/Sierra 2500/3500

Restore compression, stop coolant loss, and add peace of mind with Fleece’s Freedom Series passenger‑side cylinder head for the 6.6 L LML Duramax. Machined and assembled in Fleece’s Freedom Racing Engine facility, every head is cleaned, decked, pressure‑ and leak‑tested, and fitted with all‑new guides, seals, and springs-ready to bolt on with no core charge.

Key Features

  • New bronze valve guides, OE‑rate springs, and Viton® valve‑stem seals pre‑installed.
  • Precision‑ground stock valves with a 45° seat and multi‑angle valve job for optimal flow.
  • Deck surface milled to < 0.002″ flatness-seals MLS gaskets reliably.
  • Pressure & leak tested at 60 psi to verify coolant‑side integrity.
  • Sold outright-keep your original head; no core return required.
  • Backed by Fleece’s 1‑year limited parts warranty.

What’s Included

  • Fully assembled passenger‑side cylinder head (ready to install)
  • Factory‑style injector cups installed
  • Comprehensive installation guide

Vehicle Fitment

Direct replacement for 2011‑2016 GM Silverado & Sierra 2500/3500 HD 6.6 L LML Duramax in all trims (WT, LT, LTZ, High Country, SLE, SLT, Denali, etc.). Fits 2WD and 4WD models.

Technical Specs

Part Number FPE‑61‑10004‑P (passenger)
Material Cast‑aluminum, CNC‑machined
Valve Size Stock OE, 45° seat
Pressure‑Test 60 psi coolant & oil passages
Warranty 1‑Year Limited

Recommended Companion Parts

  • FPE‑61‑10004‑D – Driver‑Side Freedom Series head to freshen both banks.
  • GM 12637788 – Grade C MLS head gasket (right/passenger).
  • GM 12637785 – Grade C MLS head gasket (left/driver).
  • ARP 230‑4201 – ARP 2000 head‑stud kit for 200 k psi clamping force.
  • FPE‑34563 / FPE‑34564 – PowerFlo in‑tank lift pumps (short‑/long‑bed) to stabilize rail pressure after a top‑end refresh.

Installation Notes

Pair with new Grade C MLS gaskets and ARP head studs for best sealing. Always chase head‑bolt threads and verify flatness of the engine deck before installation. Torque in three steps following GM’s factory pattern; final torque varies with fastener type (stock bolts vs ARP studs).

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