Description
KOSO’s replacement parts for the Grom 4V Cylinder Head is the perfect part for completing the KOSO Big Bore kit. This replacement head is great for those of you looking for a bump in power and torque, please note this kit will only fit 2014-2020 Groms with the KOSO 170cc Big Bore Kit. This kit features: a feature, stainless steel 24mm intake valves, and 20mm exhaust valves.
