Straightline's Billet Head with inserts. adds 4-5hp. Check out the best looking head on the market. This head helps substantially with cooling because of it's large cut-outs around the domes. The head comes complete with the new improved combustion chamber, for better fuel efficiency and increased mph. Head comes anodized black. All inserts and o-rings are included in a kit.

1000 Summit include only the domes.