BBC 345cc Pro-1 Head 121cc R/P 2.30/1.88 Bare

Inspired by championship-winning Pro Stock designs, the Dart Pro1 Aluminum Big Block Chevy Cylinder Head features rolled valve angles, improved spark plug location, extra long intake valves, raised exhaust ports, and fast burn chambers. It is compatible with off-the-shelf pistons, valvetrain components, and intake manifolds. Key features include premium 355-T61 aerospace alloy construction, bolt-on compatibility with stock accessories, heart-shaped 121cc chambers for improved combustion efficiency, and raised spark plug locations for a quicker, more complete burn. The exhaust ports are raised .300" to improve flow (requiring 1" longer head bolts next to exhaust ports). Spark plug holes are machined for gasketed 3/4" reach plugs, and manganese bronze valve guides extend cylinder head life and reduce valve stem wear. Stage 1 Assemblies include stainless steel severe application valves, dual valve springs, 10-degree chrome moly retainers, 10-degree super locks, VTO seals, spring seats, ARP rocker studs, and guide plates, with competition seat and guide work done on Serdi.