i think i am going to ask cfmoto directly , the only objection they could have is that the improved air path might lein the mixture, but im going to run a A/F gauge and fuel controller (AFR+), so should be acceptable .I dont do much mudding so i dont need to relocate the rad so will buy a second air box lid and plasti weld a 3 inch abs fitting on and go straight up just missing the roof then stick a donaldson on the top they are xpensive $300 but i have used them in the most extreme conditions (sahara dessert ) in a former life ,with amazing results, even a bend at the top would be avast improvement will do the clutch to , how do u get that oval pipe to 2 inch abs ? thanks