Wiseco Honda Civic Acura RSX K20 87MM 9.8: 1 forged pistons US-K631M87

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 87.00mm Stroke 86.00mm Wiseco compression ratio (CR) 9.73: 1 Rod Lgth. 139mm Dome volume (CC) & nbsp