Stage 4 RZR Head

Stage 4 Big Valve  

REQUIRES CORE CYLINDER HEAD

-CNC Ported Runners & Chambers                                                                                                                                                                                                                                                                  -Bronze valve guides honed to precise tolerances

- Performance Newen 5-Angle/Radius Valve seat profiles 

- Surfaced to single digit Ra's 

- Assembled and blueprinted  

Hardware Included:

- BC Intake and Exhaust (inconel) Valves 

- BC Beehive Spring kit with chromoly retainers

- New Valve Seals 

- New Valve Locks