BOYESEN CARBON TECH ROTARY VALVES RV-159

Space-age technology for your Ski-Doo

Carbon fiber rotary valve is stronger than steel and weighs half as much

These valves can stand up to the toughest punishment and will not harm your engine

155 deg. great for low/mid rpm; 159 deg. for mid/tapered; 163 deg. and 169 deg. for superstock to modified snowmobiles