Yep, I've been a Polaris mechanic for 20 years and every atv that comes in needing a valve job or has excessive oil consumption has a K&N on it. We realized it years ago when the fuel injected engines came out, the injector is between the engine and the throttle body, therefore the throttle body stays dry of fuel, on these the amount of dirt build up in the throttle body is unbelievable with a K&N. We don't sell them anymore either.