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Great cylinder head airflow has been a key enabler of the LS-Series' exceptional performance. Chevrolet Performance delivers those power-building attributes to you with a range of production-style aluminum heads. From the LS6 heads for smaller-displacement engines, to LS7 style heads for 427 in. and-larger combinations, these bare cast aluminum heads benefit from extensive research and development—ensuring maximum airflow without compromises. In fact, many professional builders use these heads as straight bolt-ons with no further machining. The engine cylinder heads are designed, engineered, and tested to rigorous standards, and are backed by General Motors. These replacements are the true OE parts installed during the production of or validated by GM for select vehicles. LS7 CNC-ported cylinder head assembly notes: * 356-T6 aluminum head * Fully CNC'd ports and chambers * LS7 rectangle port design * Minimum 4.100 in. bore * 270cc CNC'd intake ports, 85cc CNC'd exhaust ports * 70cc CNC'd combustion chambers * Capable of over 600 hp Aluminum LS family head technical notes: * Manufactured from 319-T5 aluminum alloy * High-efficiency combustion chambers * Symmetrical intake and exhaust ports * Angled spark plugs (14mm; 5/8 in. hex; 3/4 in. reach; taper-seat plugs) * 15 degree valve angle (except C5R and LS7) * Bolt-down-type rocker arms (except LSX-DR, LSX-CT) * Centerbolt valve cover hold-downs * Fits Gen III and Gen IV small blocks only NOTE: Chevrolet Performance heads will not fit 4.8L and 5.3L engines, due to their smaller bore sizes.
Not Yet Reviewed
$3,234.74
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 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 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
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 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
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