The Fast, Easy Way To Bolt-On 65HP!

The Turbo-Swirl cylinder heads are designed for 289/302/351 Windsor-style engines. They feature improved air flow over original GT-40 aluminum heads. Heads use either GT-40 or aftermarket performance intake manifolds, headers and valve covers. Made from 356-T6 aluminum castings and weigh approximately 22lbs. each (25lbs. lighter than cast iron GT-40 heads). Each head is leak tested prior to assembly and feature high temp exhaust valve seats, thick deck for improved sealing, increased section thickness for porting and webbed rocker bosses.