Koso Honda Grom 14-15 4V Cylinder Head Kit

The Koso 4V Cylinder Head kit for Honda GROM is the ideal engine part to complete the Koso Honda GROM Big Bore kit. Because of its unique 4 valve design, the air flow and performance are increased. This new designed head is the perfect addition for those who desire more power and torque. The 4 Valve Cylinder Head Kit features a forged piston, stainless steel 24 mm intake valves and 20 mm exhaust valves. Feel the speed! Fits only Koso Big Bore kit

The Koso High-flow Grom oil pump is also suggested when installing this kit which includes the cylinder head

WARNING: THIS IS AN AFTERMARKET PART BUILT FOR RACING PURPOSES ONLY. KOSO IS NOT RESPONSIBLE FOR ANY DAMAGES CAUSED TO THE PARTS, VEHICLE, OR TO YOURSELF AND OTHERS. ENGINE PARTS ARE NOT UNDER WARRANTY NOR IS COLLATERAL DAMAGE OR COST OF LABOR, IN CASES OF MALFUNCTION.

Instructions & Exploded View