Skip to content
Starting at $28/mo or 0% APR with Affirm
Starting at $28/mo or 0% APR with Affirm

Kill Devil Diesel LBZ Duramax Cylinder Heads

No reviews
Original price $3,175.00 - Original price $3,175.00
Original price $3,175.00
$3,275.00 - $5,150.00
Current price $3,275.00
Add CNC Porting: No Thanks - Leave mine 'as casted'

The Kill Devil Diesel Duramax Diesel Cylinder Heads are designed for use on moderate to high performance 6.6L Engine applications. KDD cylinder heads offer "out-of-the-box" bolt-on performance with no additional machine work required. Complete cylinder heads and are finish assembled with Fully Nitrided, Stellite faced intake and Inconel exhaust valves, high performance valve springs and are ready for installation right out of the box. The intake and exhaust ports on these heads are designed for increased flow over stock and promote lower EGTs. Intake and exhaust valve locations are moved inward toward the bore center for improved swirl during the intake phase. Deck thickness is also increased to 16mm for superior durability.

These heads were produced and designed with the experts at Mast Motorsports, world renowned for their ground breaking GM LS cylinder heads and engines.  We've partnered with Mast to combine resources to offer the very best cylinder heads on the market!!


• Improved air flow and motion characteristics can deliver an increase in power and torque
• Designed, cast, machined and assembled in the USA
• Injector cups are integrated into the castings for LB7 applications
• Castings are treated to Hot Isostatic Press (HIP) process for strength
• Heat-treated to T7 for the extreme diesel operating environment
• Thick 16mm deck for increased cylinder pressures
• Raised rocker valley adds water volume in head
• All factory components bolt on without modification
• 50-state CARB emissions legal (E.O. #D-215-102)



LB7, LLY, LBZ, LMM, LML available

Free Shipping

When you spend $400+

Give Us A Call

+1 (252)-725-1222

Chat With Us

We offer 24-hour chat support


Limited warranty included