Speed Pro FMP H631CP30 Chevy 350 355 SBC Flat Top Pistons + Cast Rings Kit .030

Part Number H631CP30. If you're looking for pistons with an unbeatable combination of performance and value, then Speed-Pro hypereutectic pistons are for you. These pistons are manufactured from FM244 aluminum alloy, which contains 16 percent silicon for greater strength and wear resistance.