PRO CIRCUIT High Compression Piston KXF250 17-19High-Compression Piston Description: Pro Circuit pistons work equally well in stock or modified engines giving you more power at every rpm. High-compression pistons will add low-end torque and top-end power. High-Compression Piston Features: • Piston • Rings • COATED Wrist Pin • CirclipsSKU: RPK18250F