This "X bike" billet head kit has already dominated the race circuit. No other head kit can even come close. Extremely efficient heat sink, 3 compression options, High rpm race piston kit included. Viton O Ring sealed dome. Ported versions run over 11,500 rpm under load! Reed valve versions run over 12,000 rpm!

• X Bike billet head kit includes:
• Billet Heat sink
• billet dome- pump gas, pump/race gas, race gas/alcohol
• High RPM racing piston kit
• X Bike cylinder cut to accept head
• Head studs
• NGK Spark plug
• Base gasket