1) I'm looking at replacing the air filter on my GH Factory Turbo with a K & N set up. Any recommendations on the best system to use and how much better does everything run with this improvement?
2) At the moment my crankcase breather feeds back into the original air cleaner set up. If you install an after market system, does this need to be re-routed somewhere else or can you just put a filter on it and have it vent into the engine bay?

Thanks in advance for your help...