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Unlock the soundtrack and response your Focus ST deserves with this premium rear section upgrade for the ST250 Mk3. Built in 3 inch 76.2 mm mandrel-style pipework from the catalyst backwards, this system replaces the centre and rear sections to deliver a sharper throttle feel, a deeper tone and a quality finish that looks as good as it sounds.
Choose your sound level to suit your build. The resonated option keeps a refined, sporty character for daily use. The non-resonated option removes the centre silencer for a louder, more aggressive note that really lets the 2.0 EcoBoost breathe. Both versions are a direct replacement and come complete with the required fittings and gaskets for a straightforward install.
Why enthusiasts pick this ST250 rear system
3 inch 76.2 mm free-flow tubing for improved gas flow and response
Fits from the catalyst back, replacing middle and rear sections
Sound choices: resonated for subtle sporty, non-resonated for a louder track-inspired note
Tailpipe options to match your style:
Twin 4 inch inward rolled slash-cut tips
4.5 x 3 inch slash-cut oval tips
4 inch inverted slash-cut tips available in a Blackout ceramic coated finish
Polished 304 stainless tailpipe finishes for a premium look
Supplied with all relevant clamps and gaskets
Proven performance gains
Independent testing of the cat-back configuration recorded power at 261.5 bhp with an 8.27 percent uplift in torque, from 254 ft lb to 275 ft lb. The brand’s full turbo-back setup also demonstrated a significant weight saving of 22.5 percent versus the factory system. If you are starting with a rear section upgrade, this cat-back is the perfect foundation for future tuning.
Real-world results, happy drivers
We run this setup on our own builds and customers consistently praise the fit, finish and tone. It transforms the character of the Mk3 ST without fuss, with a deep, purposeful soundtrack on throttle and a tidy cruise when paired with the resonated centre.
Perfect for ST tuning and sound upgrades
Ideal search terms our customers use when looking for this product include: Focus ST250 exhaust upgrade, Mk3 ST 2.0 EcoBoost rear system, performance back box, sports rear silencer, catback kit for Focus ST, 76mm exhaust system, stainless steel tailpipes, twin exit tips, oval slash-cut tips, blackout exhaust tips, Focus Mk3 tuning parts, Ford ST sports exhaust, free-flow exhaust for turbocharged EcoBoost.
Fitting service
Want it installed professionally Don’t leave it to chance. Book fitting with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a tailored quote and availability.
