Cobra Sport performance exhausts enhance the sound, looks and quality of your vehicle giving you the ultimate driving experience. Our sports exhausts range is fully guaranteed to give you assurance of our quality.This Corsa SRI performance exhaust is 2.5" (63.5mm) pipework fits directly between the turbo and the centre section.These exhausts remove both the pre-cat and main catalyst (first and second sections).The sports cat exhaust option will enable your car to pass a UK MOT emissions test and police road side checks.This exhaust is also sold with a de-cat option which is for motorsport and off road use only, this option exhausts will NOT be able to pass a UK MOT emissions test or police road side checks.All relevant fittings and gaskets are supplied. (Except turbo clamp).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.