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