Description Reviews USED MINI Cooper S John Cooper Works 380cc Injectors. VERY LOW MILES. We took these off a car based on the tune that was already on the car and was not tuned with these injectors. Based on how the This is a plug and play option for a bit more injector with out too much work. It is still best to tune the car to get the most of your car. Not only will you get more horse power, but you will also get better MPG by doing so. These injectors are USED OEM units, not a rebuild or re-drill. Sold as a set of 4. Note: There are no returns on this part and is sold as is.