New 2019 Take Offs! Our Pit Bull Serviced Heads are for use with big bore kits and/or racing applications that require increased air flow. Kibblewhite High Flow Oversized Valves are +2mm intake and +1mm exhaust. Stage 4 heads requires oversized Induction. Final combustion chamber cc range 89-90 cc. Pit Bull Stage 4 Serviced Heads will be a complement to all the other high performance engine enhancements and parts you already have on your bike. New Kibblewhite Oversized Valves +2mm intake (42mm), +1mm exhaust (33mm). New Kibblewhite Viton Valve Guide Seals. Combustion Chamber 89cc's +/- 1cc on adverage (kept stock size so compatible with all aftermarket big bore kits). Our passion…