Yamaha 90 High Compression Billet Head Kit Dome Size:29cc Domes Approx 250 PSI - (Race Fuel Only) Race fuel only)

Race fuel only)

Important Note: Complete Set - 3 Cylinder Engine

TSR Yamaha 50 Billet Engine Head Kit best bolt on mod you can do or your outboard

Block off plate reuses standard o'rings from fuel pump (not included)

KX500 Clutch Housing Gasket

Yamaha 90 High Compression Billet Head Kit Dome Size:29cc Domes Approx 250 PSI - (Race Fuel Only) Race fuel only)TSR Yamaha 90 Billet Engine Head Kit best bolt on mod you can do or your outboard Our billet head kit has increase cooling volume and improved heat dissipation, with the squish clearance being tighter than stock and designed to be more detonation resistant with overall improved power through the whole rev range with multiple dome sizes to choose from to suit both pump and race gas applications This is a direct bolt on kit with no other mods required.