Wiseco Honda Civic Acura RSX K20 forged pistons 86.5MM 9.8: 1 US-K631M865

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. The result is less clearance between the cylinder and a lighter piston. Set: Pistons, rings, pins and pin protectors Product detailed specification Bore size 86.50mm Stroke 86.00mm Wiseco compression ratio (CR) 9.63: 1 Rod Lgth. 139mm Dome volume (CC) & nbsp