Cobra 50 Pax Racing Venom High Compression Head Insert. This will help raise the compression to give it a better take off on the bottom end without changing the port height. Years2017+ Part #PAX-COB50V-50HI..
Cobra 50 60cc Pax Racing Venom Higher Compression Head Insert. This will allow you to be able to raise the ports without having to port your cylinder. Must add .020" more to your base gasket.Years2017+ Part #PAX-COB50V-60HI..