AirFilter

I have seen four options for the air filter.

1. Stock.

2. K&N Drop in. With or without restrictor. No restrictor requires re-jet. http://www.knfilters.com/search/product.aspx?Prod=SU-5589

3. K&N Lunchbox. Requires re-jet. http://www.knfilters.com/search/product.aspx?Prod=RU-2970

4. Cheapo Pods. May claim to require re-jet, but depends on manufacturer and model.