Cobra Exhausts - Ford Focus ST Estate (Mk4) Front Downpipe Sports Cat / De-Cat Performance Exhaust

Pipework Diameter: 3.5" (88.9mm) > 3" (76.2mm)

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 Focus ST Mk4 performance exhaust is made in 3.5"/88.9mm reducing to 3"/76.2mm bore pipework and fits from the turbo to the centre section.

The de-cat exhaust version is sold for motorsport and off road use only worldwide.

The sports catalyst version replaces a factory emissions device and is not EC homologated. This may not meet current emission laws for road use in your territory. 

All relevant fittings and gaskets are supplied for fitment.

Fitment will require engine tuning at time of fitment to cancel the EML light.

Please note: fitment to the standard GPF section is not recommended as one of the GPF sensors found on the O/E downpipe is not included on this part and will need to be blanked off when fitting impacting on GPF functionality.

Cobra Sport Exhausts provide the performance exhaust solutions for the Mk4 Focus STs raced by the MB Motorsport accelerated by Blue Square and Motorbase Performance teams in the 2021 Kwik Fit British Touring Car Championship. This technical partnership allows us to test our products on track at the highest level of British Motorsport. The experience gained from the competitive track environment is fed back into all of our road going performance exhaust systems.

Press Release

As with all new models, the Mk4 ST Estate is fitted with a GPF (petrol particulate filter), which limits the potential of the engine, leading to a muted and slightly disappointing sound.

Cobra Sport's engineers have developed a solution in the form of their new PPF Delete. This high-quality, 3in (76.2mm) TIG welded stainless steel performance exhaust removes a significant restriction in the exhaust system.

A direct replacement for the OEM part, the Cobra Sport GPF Delete is the most cost-effective way to improve the sound of the stock Mk4 ST Estate. A simple ECU reflash will be required at the time of fitting to prevent engine warning lights illuminating.

Like all Cobra Sport exhausts, this product utilises precision TIG-welding techniques for exemplary fit and finish a feature that sets Cobra Sport apart from other manufacturers.