The last Mk I variant to be produced using the supercharged Tritec engine was the Mini Cooper S with John Cooper Works GP Kit quasi-race - prepped John Cooper Works model .
The Mini Cooper S with John Cooper Works GP Kit is a light - weight .
The last Mk I variant to be produced using the supercharged Tritec engine was the Mini Cooper S with John Cooper Works GP Kit , a light - weight , quasi-race - prepped John Cooper Works model .