If you run this head with our performance pipe

We offer two different dome configurations:

Our unique baffle design (never needs to be re-packed) has a nice deep throaty sound without being loud

This means we switch you out to a regular shim under bucket style adjustment

(This is the kit you'd use if you are just looking to upgrade your secondary clutch and do your own primary clutching)

Exhaust Valves Rave Style / Arctic Cat Select Model:F/M/X-Fire 1000 If you run this headWe 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