Milltek Cat-Back Exhaust for BMW F32 428i Coupe (N20, Automatic) 2014-2020 - 435i-Style Dual-Outlet Conversion - Non-Resonated, Titanium Tips - T304 Stainless - Requires 435i M Sport Rear Valance - No Tow Bar - SSXBM1022

Milltek Sport Rear Section Upgrade for BMW 4 Series F32 428i Coupe N20 2014 to 2020 - Twin Exit 435 Look - Loud Version - Titanium Tailpipes - T304 Stainless - SSXBM1022

Give your 4 Series the soundtrack and presence it deserves with this UK-built Milltek Sport rear system. Designed as a twin outlet 435-style conversion for the F32 428i, it delivers a crisper, fuller, noticeably louder tone with stunning titanium tailpipes and premium austenitic stainless construction. Part number SSXBM1022 is the go-to performance exhaust for owners who want a sharper response, motorsport-inspired tips and OEM-plus fit and finish.

Why enthusiasts choose SSXBM1022

• Transforms the single exit 428i into a symmetrical twin tip look that mirrors the 435 aesthetic
• Louder straight-through design for a more engaging, characterful soundtrack compared to the quieter silenced version
• Titanium tailpipes for a lightweight, race-bred appearance with a rich satin sheen
• Crafted in Britain from T304 non-magnetic stainless for long-term durability and corrosion resistance
• Mandrel bent pipework to maintain consistent diameter and flow for improved throttle response
• Tone developed to keep cabin boom in check for daily driving
• Direct rear section replacement that retains factory emissions equipment

Fitment and details

• Vehicle platform: BMW 4 Series F32 428i Coupe
• Engine: N20 turbo petrol
• Model years: 2014 to 2020
• Transmission: Automatic
• Tow bar: Not suitable for vehicles with a tow hitch
• Part number: SSXBM1022

Important: This twin exit conversion requires a genuine 435i M Sport rear diffuser to accommodate the second outlet. Please source the correct valance before installation.

Built to perform

• Hand finished in the UK by experienced fabricators
• Precision mandrel bends for optimal gas velocity
• Premium T304 stainless throughout for strength and heat resistance

Real-world feedback

We have installed this system on customer 428i builds and the response has been overwhelmingly positive. Expect a deeper idle, a clean turbocharged rasp under load and a pronounced uplift in character without harsh resonance on cruise.

Professional fitting

Want it fitted properly first time? Book installation with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

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