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PROMAXX Performance GM 6.5 Diesel Cylinder Heads

PROMAXX Performance designed and developed these cylinder heads from the GM 6.5 diesel casting. They are cast iron direct bolt-on replacements for your 6.5L diesel engine. The assembled heads have straight intake bolt holes in the cylinder head, and will typically use a one-piece intake manifold. Order the model recommended for your Chevy or GMC truck.

4.88 out of 5 stars ( 8 )

$538.00

PROMAXX Performance Cummins 6BT Cylinder Heads

PROMAXX Performance Cummins 6BT cylinder heads are designed and developed using factory Cummins 6BT castings. These replacement cylinder heads feature castings thicker than standard OE specifications in crack-prone areas for added durability. They're generously offered assembled with valves, valve seals, springs, retainers, and locks. Improve the already impressive reliability and longevity of your Cummins turbodiesel with PROMAXX Performance 6BT cylinder heads.

3.25 out of 5 stars ( 4 )

$711.00

PROMAXX Performance Series One Small Block Chevy Cylinder Heads

PROMAXX Performance Series One small block Chevy cylinder heads are high-flowing heads at a great price. PROMAXX economical "As-Cast" aluminum versions feature ultra-smooth 356-T6 casting, precision machining, and an array of assembled options, as well as being available bare. Series One cylinder heads have the right stuff to perfectly fit your budget build with abundant power.

5.0 out of 5 stars ( 2 )

$650.00

PROMAXX Performance Series One Small Block Ford Cylinder Heads

PROMAXX Performance Series One small block Ford cylinder heads are affordable, high-flow as-cast versions of fully CNC-ported heads. These heads feature ultra-smooth 356 T-6 aluminum casting, 5-angle valve jobs, precision CNC machining, and diamond-honed bronze guides. Put track-tested performance under your hood with a formidable pair of professionally assembled Series One small block Ford cylinder heads. They are available assembled or bare. Features, items, and specs: * 175cc as-cast intake runners * Multiple spring options * Assembled heads include 21-4N one-piece swirl-polished back-cut stainless steel valves, 3/8 in. studs, and adjustable guide plates

4.0 out of 5 stars ( 1 )

$511.00