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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 Maxx Series Small Block Ford Cylinder Heads

Maximum quality, maximum performance, and minimum pricing—PROMAXX Maxx Series SBF cylinder heads take affordable power to the next level. With ultra-smooth Grade A 356-T6 aluminum castings that are precision machined, these small block Ford heads deliver awesome air speeds with super-efficient chamber designs to produce the power and torque you've sought for your setup. Maxx cylinder heads feature 5-angle competition valve jobs, diamond-honed bronze guides, and hand bowl blending. They also offer these heads bare. Get superb out-of-the-box performance, without emptying your wallet, when you order PROMAXX Maxx Series small block Ford cylinder heads.

4.0 out of 5 stars ( 14 )

$1,232.00

PROMAXX Performance Freedom Series Small Block Chevy Cylinder Heads

PROMAXX Performance Freedom Series small block Chevy cylinder heads offer exceptional quality at an unbelievable price. Manufactured from high-quality aluminum, they are assembled with the finest components. Freedom Series cylinder heads feature one-piece stainless steel intake and exhaust valves, enhanced intake runners, and performance valve springs with steel retainers. They're available in straight or angle plug designs. Horsepower costs money. With Freedom Series small block Chevy cylinder heads, PROMAXX Performance offers you the opportunity to bolt on the power that you've been looking for, at the price you want.

4.23 out of 5 stars ( 65 )

$1,101.00

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$1,197.00

PROMAXX Performance Stock Replacement Cylinder Heads

PROMAXX Performance stock replacement cylinder heads are designed to be a direct replacement for your worn or cracked heads. These are new castings, modeled off OE castings for factory fit and finish. Some applications feature a thicker deck to solve common warping or cracking issues. Instead of spending the time and money refurbishing your existing heads, use PROMAXX Performance stock replacement cylinder heads.

4.57 out of 5 stars ( 7 )

$478.00

PROMAXX Performance Maxx Series Small Block Chevy Cylinder Heads

Maximum quality, maximum performance, and minimum pricing--PROMAXX Maxx Series SBC cylinder heads take affordable power to the next level. With ultra-smooth Grade A 356-T6 aluminum castings that are precision CNC-machined, these small block Chevy heads deliver awesome air speeds with super-efficient chamber designs to produce the power and torque you need for the street or strip. Maxx cylinder heads feature 5-angle competition valve jobs, diamond-honed bronze guides, and hand bowl blending. Get out-of-the-box performance that kicks up the power without emptying your wallet--PROMAXX Maxx Series SBC cylinder heads.

4.35 out of 5 stars ( 23 )

$1,193.00

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$1,292.00

PROMAXX Performance Project X Small Block Ford Cylinder Heads

PROMAXX Performance Project X small block Ford cylinder heads are one word—awesome! They feature ultra-smooth 356-T6 aluminum casting, 5-angle valve jobs, precision CNC machining, and diamond-honed bronze guides and can make big power in your small block Ford application. The new swirl designed chamber is the difference. Couple that with a state-of-the-art new casting and you have a home run! Fit your budget build with abundant power with PROMAXX Project X small block Ford cylinder heads.

4.67 out of 5 stars ( 3 )

$1,560.00

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$1,833.00

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 OE-Replacement Jeep Inline Cylinder Heads

PROMAXX Performance OE-replacement Jeep inline cylinder heads offer direct bolt-on power. Developed and designed from factory castings, these iron heads feature hardened valve seats and heavier-than-stock castings to resist cracking and warping. They replace your stock components and restore original performance. Once again, your rig will be readied to take on aggressive off-road adventures. The heads are available complete with valves and springs. Order the model recommended for your engine application.

3.0 out of 5 stars ( 3 )

$937.00

PROMAXX Performance Ford OE Cylinder Heads

PROMAXX Performance Ford OE cylinder heads are designed and developed using OE Ford castings. These bare cast iron replacement cylinder heads feature direct bolt-on fitment. Improve the reliability and longevity of your 2.3L or 2.5L OHC Ford engine with PROMAXX Performance Ford OE cylinder heads.

Not Yet Reviewed

$400.00