I put a set of Rk-tek pistons in my sled two season's ago and 1800km later, i detonated the mag side in Revy. Turns out i put the wrong base gasket in (too thin) so mountain magic has put in a new kit that comes from Rk-tek that comes with a different head and is said to bump up the motor 15hp. I can't wait ride with this new setup.