Speed Pro Hypereutectic Flat Top Piston Set (8 Pistons)

The Speed Pro H345CP pistons are hypereutectic aluminum pistons designed for an unbeatable combination of performance and value. Crafted from FM244 aluminum alloy with 16 percent silicon, these pistons deliver superior strength and wear resistance. They are manufactured using state-of-the-art permanent-mould technology to ensure precise fit and the tight bore clearances demanded by high-performance engine builders. These pistons are engineered with a flat top design and feature four valve reliefs, making them suitable for high-performance street applications, bracket racing, and oval track racing. Each set includes 8 pistons with pins and is available in standard bore sizes, as well as .020”, .030”, .040”, and .060” oversizes. Piston rings are also available separately in cast or moly options. Key specifications include a 1.548” compression height, a 4.00” bore, 5.700” rod length, and a 3.480” stroke. The piston head volume is -5cc, and the pin diameter is 0.928” with options for press-fit or floating pins. The piston ring thickness is 5/64”, 5/64”, and 3/16”.