PROMAXX Performance Shocker Series Small Block Chevy Cylinder Heads

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 Show Less