UCF Machineshop Cylinder Heads 
6.6L GM Duramax® Diesel Heads
With Refundable Core Return

!!! SALE !!!

Like most in the current business climate, we strive to keep our items in stock and ready to ship, we occasionally run into delays. Please call to confirm availability before ordering. 717-249-8517

NOTE: Dynamic Pricing above does not include shipping which the web store adds during checkout in the cart.

Listed price includes refundable core charges.

6.6L GM DURAMAX LB7 HEADS (2001-04, VIN: 1, casting #'s: 587-2 & 687-3, not 041-1)
          Note: We do not sell LB7 casting # 041-1 California Emissions EGR heads and do not accept them as cores.
          Caution before choosing to return LB7 cores: Duramax LB7 heads with eroded injector holes will not be accepted as useable cores.

• Total online price $2524 $2,369 for pair of heads shipped within the Continental US** including refundable core charge (excludes applicable taxes)
  • Includes: $1751 $1,596 - Duramax Reman Heads (pair)
  • Includes: $412 (Core charge $206 x 2 — *CORE CHARGES policy link below)
  • Includes: * Shipping - $361  (Continental US) - pre-paid return tags included **
• O-ring option: Helps prevent head gasket failure, for another $463
• Porting and Polishing option: just $1287 over base heads (includes O-ringing)

6.6L GM DURAMAX LLY HEADS (2004.5-05, VIN: 2, casting # 409-1)
6.6L GM DURAMAX LBZ HEADS (2006-07, VIN: D, casting # 476-1)
6.6L GM DURAMAX LMM HEADS (2007-11, VIN: 6, casting # 704-1)
6.6L GM DURAMAX LML HEADS (2011-16, VIN: 8, casting # 704-1 with 1mm smaller injector holes) Select LMM but notify us that you need LML heads

• Total online price $2112 $1,958 for pair of heads shipped within the Continental US** including refundable core charge (excludes applicable taxes)
  
  • Includes: $1339 $1,185 - Duramax Reman Heads (pair)
  • Includes: $412 (Core charge $206 x 2 — *CORE CHARGES policy link below)
  • Includes: * Shipping - $361  (Continental US) - pre-paid return tags included **
  O-ring option: Helps prevent head gasket failure, for another $463
• Porting and Polishing option: just $1287 over base heads (includes O-ringing)

*Please read about Core Charges in our FAQs.
** We include  UPS return tags with your order on all items shipped within the Continental US. Shipping is pre-paid back to UCF Machine Shop. If you have questions please read our shipping policies or give us a call. Outside of Continental US, call prior for shipping quote.

All heads have had the following remanufacturing operations completed:
• Completely disassembled and inspected
• Heads are thoroughly cleaned in our hot acid jetwash & media blasted
• Cooling system pressure tested
• LB7 heads are inspected for injector hole erosion
• LB7 heads have all new injector cups and seals installed
• Valves, valve guides, valve seats, springs, retainers, and keepers inspected and replaced as necessary
• Resurface the fire deck
• Multi angle performance valve job with 3 angles
• Set spring pressure, spring height, stem height, and valve recession
• New Viton® valve stem seals installed and assemble head

O-ring option, helps prevent head gasket failures:
• O-Ring grooves machined into deck and stainless steel wire installed

Porting option:
• Multi angle performance valve job with 5-7 angles and radius cut for improved flow
• Porting concentrating on the bowl and seat area of the ports yielding significant gains
• Exhaust ports matched to gaskets
• Intake airflow improvements typically gains 17-25+% below .500" lift
• Exhaust airflow improvements typically gains 18-30% below .500" lift
• Modified to work well with factory and performance cams
• Lowers EGTs, Lowers required boost; Increases Efficiency and Power

For 6.6L GM DURAMAX LML HEADS (2011-16, VIN: 8, casting # 704-1 with 1mm smaller injector holes)
Select 6.6L GM DURAMAX LMM HEADS (2007-11, VIN: 6, casting # 704-1)
These 2 engines use the same head casting number, but have different fuel injector tip/hole sizes. Select LMM but specify LML when ordering.