Maximum street or marine performance, bracket racing, heads up and super classes. Over 7,000 RPM, 540+ cubic inches.

The PRO1 24° 345cc cylinder head is for uncompromising performance and racing applications which favor high RPM power over low end flexibility. Best for big cubic inch, high RPM use.

Rolled valve angles, improved spark plug location, extra long intake valves, raised exhaust ports, and fast burn chambers. Works with off the shelf pistons, valve train components, and intake manifolds.

Long wearing Bronze valve guides, screw-in studs, multi-angle intake seats with hardened, radiused exhaust seats are standard.

Assemblies include Stainless Steel valves, premium springs, locks, retainers, guide plates and seals.

Heads are sold individually.