You may want to try the TRUEFLOW air filter. I did some research before buying my filter and to ME this one actually works better than the K&N filter. I have the completer cool-air kit with Trueflow filter in my Boxster and it works great. It's been in for over a year now and no problems. They NO LONGER make the complete kit, but do still sell the filter. It also comes pre-oiled. Again, no problems with my M.A.S. and looks like a better design to me.
