AIRTEC Motorsport De-Cat Downpipe for Focus ST250

By removing the original restrictive catalytic converter located within the factory OEM downpipe, back pressure is hugely reduced, which effectively improves the engine’s breathing by allowing it to expel gases more quickly. This in return means faster throttle response, increased power output and a more aggressive exhaust note.

The original catalyst and down pipe , unlike the older ST225 and Focus RS mk2, are made in one piece. This new design features some restrictive bends and an exit bore size of only 70mm.

With a new bore size of 70mm the new AIRTEC Replacement Down Pipe has over 50% more capacity.

Please note: De-cats are sold for motorsport and off road use only and will not pass a UK MOT test or police road side checks.

AIRTEC part no: ATEXHFO5