These Ford Focus Mk4 ST Estate performance exhausts are made in 3"/76.2mm pipework and fit from the Gasoline Particulate Filter section backwards (GPF-back) these exhausts replace the centre and rear sections.
All relevant fittings and gaskets are supplied.
This exhaust removes the standard rear box for the ultimate improvement in terms of exhaust tone and sound level whilst keeping the stock catalyst and GPF in place.
This exhaust system has been designed to be easily upgradable to a cat-back or full turbo-back exhaust in the future by purchasing additional sections. This exhaust has a choice of 4 tailpipe options including a 4.5" (114.5mm) carbon fibre tip.
GPF-Back (Box Delete) Test Results:
Sound - Engine at Idle: 70.9dB (+11.9dB) - Static 4,000rpm test: 93.8dB (+13dB)
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.
