PRO R Stage 2 Cams rzr engines while the bronze valve guides

while the bronze valve guides ensure exceptional durability and heat dissipation

Our most recent update to our Rotax 900 block sleeving is certainly the most reliable and effective for containing all that added boost

reliability

This K20/K24 complete engine package is built around 5+ years of testing and is the best offering for any FWD/SCDRA dirt oval car

PRO R Stage 2 Cams rzr engines while the bronze valve guidesBC0981 Polaris Pro R (21 up) Stage 2 Drop In Camshafts (pair) All purpose level spec, works with factory valve springs. Delivers excellent throttle response out of the turns or wash but still pulls on the straights. Adv Dur (. 020") 258 258 Dur @ . 050 230 230 Valve Lift (1: 1) . 420" . 420" Valve Lift (mm) 10. 67 10. 67