Serious street performance, mild bracket racing, and marine. Over 7,000 RPM, 525+ cubic inches. Can be used on smaller engines with a tight converter. The PRO1 24° 325cc delivers increased airflow at high valve lift for high RPM, big cubic inch engines, and still remains compatible 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. Best of all, our precision cast ports produce outstanding airflow without time consuming porting. Assemblies include Stainless Steel valves, premium springs, locks, retainers, guide plates and seals.

More From This Category

AFR Adjustable Guide Plates, SBC/SBF 5/16”, Ea.

AFR Adjustable Guide Plates, SBC/SBF 5/16”, Ea.

$16.70

Trick Flow Cylinder Head, Twisted Wedge 11R 190, Bare, 66cc Chamber, Aluminum, Natural, For Ford, 289, 302, 351W, Each

Trick Flow Cylinder Head, Twisted Wedge 11R 190, Bare, 66cc Chamber, Aluminum, Natural, For Ford, 289, 302, 351W, Each

$2,688.30

Trick Flow Cylinder Head, Super 23 195, Fast As Cast , Bare, 72cc CNC Chambers, Perimeter Bolt Covers, Small For Chevrolet, Each

Trick Flow Cylinder Head, Super 23 195, Fast As Cast , Bare, 72cc CNC Chambers, Perimeter Bolt Covers, Small For Chevrolet, Each

$1,580.50

Trick Flow Cylinder Head, Super 23 230, CNC Competition Ported, Assy, 70cc CNC Chambers, 460 Spring, Small For Chevrolet, Each

Trick Flow Cylinder Head, Super 23 230, CNC Competition Ported, Assy, 70cc CNC Chambers, 460 Spring, Small For Chevrolet, Each

$2,859.40