Scorpion Exhausts Ford Focus RS & ST

Cat-back and GPF-back systems: rear-section systems for the Focus ST170 (Mk1), Focus ST 225 (Mk2), Focus RS (Mk2), Focus ST 250 Hatch (Mk3), Focus RS (Mk3) including a Quiet variant, and the Focus ST (Mk4) Hatch and Wagon, with Predator GPF-back options on Mk4.

Downpipes and cats: catless downpipes, catless turbo downpipes, sports cat downpipes and high flow sports cats for Mk2 ST 225/RS, Mk3 ST 250 and RS, plus a downpipe for the Mk4 ST.

Mid-pipes and hardware: catless sections for the Mk2 platform and an exhaust tunnel brace for the Focus ST (Mk4).

Match the part to your generation and body style. Key identifiers used in the titles are Mk1 (ST170 Hatch), Mk2 (ST 225 2.5 Turbo and RS), Mk3 (ST 250 Hatch/Wagon and RS 2.3 EcoBoost) and Mk4 (ST Hatch/Wagon). Some Mk2 parts are shared between the ST 225 and RS, while Mk3 RS and ST items are listed separately.

Pipe diameters are shown in the product titles (for example 57.1mm, 63.5mm and 76mm), so check that a downpipe or catless section matches the system it will be paired with. Mk4 ST models are GPF-equipped, which is why those listings are GPF-back rather than cat-back. If you are unsure which generation or specification you have, check your build plate and VIN before ordering.

Exhaust work requires the vehicle to be safely raised and supported, and typically calls for new gaskets, clamps and fasteners, penetrating fluid and the ability to free seized hardware. Alignment and clearance should be checked before final tightening so the system does not contact the subframe, floorpan or rear valance.

Installation by a professional workshop is recommended. Catless and sports cat components may affect emissions compliance and engine management, so confirm the legal requirements in your state or territory and any tuning needs before fitting. Please check fitment against your own vehicle before purchase.

Will a Mk2 ST 225 part fit a Mk2 RS? Some listings are shared across both, and the title will state ST 225 / RS. Where only one model is named, treat the part as specific to that model.

What is the difference between cat-back and GPF-back? Cat-back systems replace the pipework from the catalytic converter rearwards; GPF-back systems start from the petrol particulate filter, as fitted to later models such as the Focus ST (Mk4).

Are catless parts road legal in Australia? Removing emissions equipment can make a vehicle non-compliant for road use. Check your local regulations, as these items may be intended for off-road or competition use.