The sports cat exhaust option will enable you to pass a UK MOT emissions test or police road side checks. The de-cat sports exhaust option is sold for motorsport and off road use only and will NOT be able to pass a UK MOT emissions test or police road side checks. All relevant fittings and gaskets are supplied EML lights may activate after removing the standard O/E catalyst. An ECU Re-map is recommended to correct this problem and stabilise all power increases.