Soldato
- Joined
- 19 Oct 2002
- Posts
- 18,086
- Location
- Shakespeare’s County
So it either varies or no one actually knows for sure
It seems Mugen and GruppeM use K&N filters
But neither are OEM.... be interesting to see what the Mugen Civic RR's use though.
Anything other than paper is a bit silly when you have the ability to increase the size of parts. Im looking at something along those lines today and moving to two airboxs with paper is the solution rather than taking the paper filter out for freer flowing cotton or foam one.
There is something to be said for the piece cost of a cheap paper one when you're building cars though aswell as something with a frequent change interval.