Does anyone know the # of the K&N cone filter that will attach to the air sensor on a 91 NA engine? Thanks, Paul

 

All you have to do is go out and measure the size of the intake then go to the parts store and tell them you need a filter with a (whatever you measure) opening.

 

I dunno if it's as good, but you can get generic cone filters for pretty cheap on e-bay. Didn't have a connection for the air pump, but I just stuck a lawn mower filter on the hose. The cone pops right onto the AFM, just make a little bracket using a piece of metal and a drill. Real easy.