Collection: Air Flow Research

Air Flow Research cylinder heads and valvetrain parts for small block Chevy, small block Ford, big block Chevy, LS and Gen 3 Hemi engines. AFR heads range from 180cc street heads through Enforcer and Eliminator Street and Race heads to CNC-ported race heads, alongside AFR valves, valve seats, bronze guides, locks, retainers, springs and intake manifolds.

Choose AFR heads by intake runner volume and chamber size: smaller runners suit street engines and lower RPM, larger runners suit big-inch or high-RPM builds. Check the spring spec against your cam. Browse heads in Cylinder Heads and replacement parts in Valves and Hardware.