i just picked up the sled that trevor john ran at the 04 x games and i read the post about the cooling part but i am now looking for an exhaust system and trail heads. anyone else do the 800 mod? i am still going to premix it at 32:1 i plan on going up to haydays to get the cooling parts and hopefully anything else that i need. this sled is pretty cool. anyone else have the ski doo power valves in their motor? never saw that before, maybe speedwerx does them all like that. thanks again todd from wi.