If you have the optional John Cooper Works air intake then you've got some work to do. When John Cooper Works created their Mini Cooper S airbox they neglected to use a high flow performance air filter. Unfortunately, their JCW Mini Cooper S air box still uses a paper filter element, which is very restrictive, significantly limiting airflow. This replacement high flow velocity stack filter is a direct fit and installs in 5 minutes. Gain 4-5 horsepower with only about five minutes work.
Motoring: Getting the Maximum from Your New MINI
This book demystifies both the process of upgrading the MINI Cooper and the techniques of driving well. In a sequence of four parts, the reader is shown how to buy a MINI Cooper, make changes that it a better performer on the road, then upgrade performance and handling for autorcrossing and track days, and finally build a full-race version of the car.