S3 - Kit, Cylinder Head, Enduro, RIEJU/GasGas, 18-Up

S3 - Cylinder Head Kit - RIEJU/GasGas Fitment: • RIEJU (21-Up) MR Pro, MR Racing, MR Ranger • GasGas (18-20) EC Kit includes: Cylinder Head Cover, O-Rings, Insert Extreme Kit - Lowers compression for a smooth and progressive delivery of power. Improved traction and engine control, especially important in technical areas. Lowers temperature by eliminating the typical hot spots of the original cylinder heads. Ideal for improved throttle feeling. Power Kit - Raises compression, improving power delivery and engine torque. Recommended for use at an average altitude of 3,300 feet. Lowers temperature by eliminating the typical hot spots of the original cylinder heads. Ideal for aggressive riding.