If you truly are into scooter performance and getting every ounce of power your GY6 engine has to offer then the 4 valve head is a must have. This kit comes with everything you need to install. Includes the 4 valve head, valves, rocker arms, cam, new stud bolts and timing chain. This part fits on: Works with the GY6, 152QMI, and 157QMJ engines
Trustpilot
2 months ago
2 weeks ago
