SBC Domed Piston Set 4.040 Bore +6.5cc

SRP Professional pistons are advanced, lightweight FSR forgings offering superior strength, up to 20% lighter than traditional equivalents. Made from high-silicon 4032 aluminum alloy for reduced piston-to-wall clearance and quiet operation. Features include accumulator grooves for improved ring seal, high-performance skirt coating, low drag performance piston rings, forced pin oiler for increased wrist pin lubrication, pin fitting, and double spiro locks. Includes 927-2750-150 wall wrist pin (130 grams). CNC machined ring grooves accept 1/16", 1/16", 3/16" rings (Sold Separately). Designed for normally aspirated or moderate forced induction/nitrous engine applications. Ideal for oval track to street/strip use.