Complete Cylinder Head CSB 262-40

Complete header in aluminum with staright plugs for Chevrolet Small Block 55-59 (Two types of bolt patterns towards Intake manufold and both new and old bolt pattern towards valve covers) Chamber/Runner: 64cc/205cc Max lift: 0.550" Springs: 1.437" Rocker arm studs: 3/8" Guideplates: 5/16" Exhaust/intake valve: 1.60" / 2.02" Price each.