ZERONINE GPF-Back Exhaust System - Ford Focus ST Mk4 Hatchback

Transform the sound, style, and performance of your Ford Focus ST Mk4/Mk4.5 with the ZERONINE DESIGN GPF-Back Exhaust System - engineered in the UK to deliver precision-fit quality, reduced back-pressure, and an exhilarating exhaust note without unwanted cabin boom. Crafted from premium 304-grade stainless steel, this 3-inch (76mm) bore system has been designed specifically for hatchback models to optimise exhaust gas-flow and retain everyday refinement while providing an unmistakably dynamic tone - enhanced further when you switch into Sport or Track modes. Each system is precision TIG-welded and finished to perfection, featuring a brushed matte finish, embossed rear resonator, and signature 09D carbon fibre tailpipe trims - a true fusion of performance engineering and motorsport-inspired design. KEY FEATURES AND ADVANTAGES 3" (76mm) free-flowing bore reduces back-pressure 304 stainless steel for corrosion resistance and durability Refined internal muffler design eliminates cabin drone Deep, performance tone in Normal mode / Enhanced in Sport mode Signature 09D carbon fibre tailpipe trims Embossed resonator casing for authentic 09 Design detail CAD designed to ensure exact fitment and perfect alignment TECHNICAL DATA Material: 304-grade stainless steel Bore size: 3.0" (76 mm) Configuration: GPF-back system (retains OE GPF) Finish: Brushed matte Weld type: TIG Tailpipes: Dual 09D Stainless Steel / Carbon Fibre tips Fitment: Hatchback models only Installation: Requires cutting after GPF in factory break point for ease of installation - cutting point info available. Sound profile: Deep tone in Normal / aggressive pops in Sport FITMENT Compatible with Ford Focus ST model years: Mk4 (2019–2022) / Mk4.5 (2022–onwards)