Yamaha 90 High Compression Billet Head Kit Dome Size:32cc Domes- 220 PSI (Race Fuel Only) x1 set of Boyesen Power

x1 set of Boyesen Power Reeds T13

We have designed our domes for maximum performance

Yamaha 30 replacement O-Ring Kit

(we recommend 28cc for most recreational use)

If you are unsure about which variant to choose please contact us

Yamaha 90 High Compression Billet Head Kit Dome Size:32cc Domes- 220 PSI (Race Fuel Only) x1 set of Boyesen PowerTSR 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.