all you have to do is make sure that the piston is not in a pinch spot when you shut your engine off bro !!! team kyosho air filter oil works the best after you clean your foams with hot water , dish soap and rub thoroughly , rinse from inside to outside , squeeze with a kitchen towel (dont piss the wife off!) , then let filter sit out until completely dry . oil before assembly of filter !!
later, monty