Wiseco forged pistons Subaru Impreza WRX STI EJ255 EJ257 99.5MM 9.0: 1 US-K598M995AP

Wiseco pistons are made of the highest quality aluminum, digitally processed using high-quality technology. Each piston has an optimized piston crown to improve filling and a specially selected wall shape for each application. This results in a smaller clearance between the cylinder and a lighter piston. Set: Pistons, rings, pins and pin protectors Product detailed specification Bore size 99.50mm Stroke 79.00mm Wiseco compression ratio (CR) 9.0: 1 Rod Lgth. 130.5mm Dome volume (CC) & nbsp