it really doesnt matter what the size of the filter is, how long or wide or what color it is. just as long as it bolts onto the piping. although, alot of people will tell you not to run a K&N or other oiled filter if you are running a MAF by the air filter.hiryux wrote:Does anyone know if the air filters are interchangeable with other companies? I have a 95 240sx with a injen short ram intake. I think its a 3" size filter. Could I just buy a K&N 3" cone air filter and would it swap with no problems?