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. They're also molded in the latest permanent-mold technology to ensure the precise fit and tight bore clearances that today's top engine builders demand. They're ideal for use in high performance street, bracket racing, and oval track racing and will work perfectly with normal ring end gaps. Bore (in): 4.000 in. Bore (mm): 101.600mm Piston Style: Dish, with four valve reliefs Piston Material: Hypereutectic aluminum Wrist Pin Style: Press-fit Pin Diameter (in): 0.912 in. Piston Ring Thickness: 5/64 in. x 5/64 in. x 3/16 in. Ford/Mercury/Linclon 302 (1977-1995) Hypereutectic Dish Top Four Valve Relief Piston.
