Exhaust Valves Rave Style / Arctic Cat Category_Default Category/SLED/Racing/Arctic Cat/Arctic Cat ZR 6000 R-SX then porting your head to

then porting your head to our proven specs

If you modify any non road engines/equipment after they have been placed into service in the United States so they will be used solely for competition

physical acoustic attenuation through rigid body absorption causing the suppression of longitudinal waves by precise

Cracking and Boost Leaks: As the stock material degrades

If we find your guides to be in bad shape

Exhaust Valves Rave Style / Arctic Cat Category_Default Category/SLED/Racing/Arctic Cat/Arctic Cat ZR 6000 R-SX then porting your head toWe have upgraded our exhaust valve technology from a membrane bellow style actuator to a piston style actuator. A much simpler design that uses less components and eliminates bellow failure in big bore and turbocharged applications. Our piston mechanism stays lubricated by the engine's 2 stroke oil system and is actuated by the exhaust pressure from the cylinder. Same design works well with naturally aspirated engines as well. We developed this valve