Pro Circuit announced the 2019 CRF450R High-Compression Piston that is now available and ready to increase performance for the new 450 Honda models. Pro Circuit High-Compression Pistons are forged from high-quality aerospace aluminum alloy using advanced CNC-machined technologies. The result is a significant gain in low-end torque and high-RPM performance. These piston kits are manufactured by JE Pistons and are designed for exceptional performance in either stock or modified engines and is a must-have engine part for serious racers.