Availability
PROMAXX Performance Shocker Series small block Chevy cylinder heads are as good as it gets for 23-degree performance heads. They feature ultra-smooth 356-T56 aluminum casting, and professionally designed runners and chambers that are meticulously CNC-ported. These heads flow over 325 cfm to easily support 725-plus horsepower. Shock the competition without breaking the bank by ordering a pair of PROMAXX Performance Shocker Series small block Chevy cylinder heads. They're available assembled and bare. Order the model with options recommended for your year/make and engine application. Features, items, and specs: * 225cc fully-ported intake runners * 5-angle valve job * Angle or straight plug * Diamond-honed guides * Large spring pockets * Multiple spring options * Assemblies include 21-4N one-piece swirl-polished back-cut valves, studs, and guide plates
( 1 )
$2,020.00
PROMAXX Performance Shocker Series small block Ford cylinder heads are as good as it gets for performance heads. They feature ultra-smooth 356-T56 aluminum casting, and professionally designed runners and chambers that are meticulously CNC-ported. These heads flow over 328 cfm to easily support 725-plus horsepower. Shock the competition without breaking the bank by ordering a pair of PROMAXX Performance Shocker Series small block Ford cylinder heads. They are available assembled and bare. Features, items, and specs: * 210cc fully CNC-ported intake runners * 5-angle valve job * Diamond-honed bronze guides * Large spring pockets * Multiple spring options * Assemblies include 21-4N stainless one-piece, swirl-polished, back-cut valves, studs, and guide plates
( 1 )
$2,024.00
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$2,500.00
PROMAXX Performance Maxx Series big block Chevy cylinder heads are custom designed to satisfy demands of the big block Chevy world, while retaining high-quality craftsmanship and reasonable prices. Available assembled or bare, these heads feature ultra-smooth 356 T-6 aluminum castings with hand-blended valve bowls, efficient chamber designs, 5-angle valve jobs, and diamond-honed bronze valve guides. Assembled heads include 21-4N swirl-polished valves, springs, retainers, 7/16 in. rocker studs, guide plates, and seals. Level up your ride with a pair of PROMAXX Performance Maxx Series big block Chevy cylinder heads.
Not Yet Reviewed
$2,144.00
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$2,879.00
PROMAXX Performance Shocker Series Ford FE cylinder heads are exactly what the Ford FE community have been missing. They start with an ultra-smooth 356 T-6 aluminum casting which is then fully CNC-ported by Keith Craft Racing, making is a definite high-performance player at a price that will destroy the competition. These heads support flow over 350 cfm to easily support any high-horsepower build. Shock the competition without breaking the bank by ordering a pair of PROMAXX Performance Shocker Series Ford FE cylinder heads. Features, items, and specs: * 200cc fully-ported runners * Professionally ported by Keith Craft Racing * 5-angle valve job * Diamond-honed guides * Large spring pockets * Multiple spring options * 21-4N one-piece swirl-polished back-cut stainless steel valves
Not Yet Reviewed
$2,399.00
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$2,980.00
PROMAXX Performance Shocker Series big block Chevy cylinder heads are professional designed cylinder heads utilizing the latest CNC porting tools and techniques. These heads out flow the competition at a price that cannot be touched. The 340 heads will flow over 415 cfm and the 370 heads will flow over 450 cfm, so your engine will never be starved for air. Shock the competition without breaking the bank by ordering a pair of PROMAXX Performance Shocker Series big block Chevy cylinder heads. Features, items, and specs: * 340 or 370cc fully-ported runners * 5-angle valve job * 24 degree intake valve and 15 degree exhaust valve * Diamond-honed guides * Large spring pockets * Multiple spring options * 21-4N one-piece swirl-polished back-cut stainless steel valves
( 1 )
$2,367.00
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$3,968.00
If you are a big block Mopar enthusiast, you know your choice for performance cylinder heads is limited. PROMAXX Performance Shocker Series big block Mopar cylinder heads are a fully CNC-machined option that flows up to 330 cfm. Don't be stuck with over-priced, under-performing cylinder heads. Let the PROMAXX Performance Shocker Series cylinder heads wake up your big block Mopar. Features, items, and specs: * 240cc fully-ported runners * 5-angle valve job * Diamond-honed guides * Large spring pockets * Multiple spring options * 21-4N one-piece swirl-polished back-cut stainless steel valves
( 1 )
$2,260.00
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$2,538.00
PROMAXX Performance Freedom Series big block Chevy cylinder heads offer exceptional quality at an unbelievable price. They're machined from high-quality aluminum and most come assembled with the finest parts (bare heads are also available). The heads feature one-piece stainless steel intake and exhaust valves, CNC bowl-blended intake runners, and combustion chambers. Freedom heads also include 7/16 in. screw-in rocker arm studs and guideplates for 3/8 in. pushrods. Order the heads recommended for your engine application.
( 3 )
$2,144.00
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$3,085.00
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