Milltek Sport Cat-Back Exhaust for BMW 4 Series F32 428i Coupe (2014-2020) 435i-Style Dual-Outlet, Resonated, Titanium Tips Automatic N20 Only, No Tow Bar Requires 435i M Sport Rear Valance SSXBM1021

Milltek SSXBM1021 Twin Exit Performance System for BMW F32 428i Coupe

Give your 4 Series the 435i look and a deeper, more mature soundtrack with the Milltek SSXBM1021 system. This from-cat back upgrade features a resonated centre section and titanium tailpipe finishers for a refined tone, crisp throttle response and a premium twin outlet rear end that looks factory fresh.

Part number: SSXBM1021

Why enthusiasts choose this upgrade

• Twin outlet 435i-style conversion for an OEM-plus appearance
• Resonated centre silencer for a controlled, drone-free drive on the motorway
• Brushed titanium tailpipe tips for a motorsport inspired finish
• Crafted in the UK from T304 stainless steel for long-term durability
• Mandrel-formed tubing for smoother gas flow and sharper response
• Precision fitment with high quality welds and hardware

Fitment and requirements

• Vehicle: BMW 4 Series Coupe F32 428i
• Years: 2014 to 2020
• Engine: N20 2.0 turbo petrol
• Transmission: Automatic only
• Not suitable for cars with a tow bar
• Requires BMW 435i M Sport rear valance to suit the twin exit layout

Sound and quality you can live with

Milltek’s acoustic development delivers a sporty, mature tone with real depth, without the boom or harshness that spoils daily driving. The resonated centre keeps the cabin calm at a cruise while giving a purposeful note when you press on. Built from non-magnetic T304 stainless with mandrel bends, it resists discolouration and stays looking smart for the long haul.

What is included

• Milltek resonated from-cat back system in twin outlet 435i style
• Titanium tailpipe finishers
• Fittings and clamps as supplied by Milltek

Tried, tested and customer approved

We have installed and run this system ourselves, and feedback from our clients mirrors our experience. The fit is spot on, the tone is sophisticated, and the transformation to a twin pipe rear end completes the car. SSXBM1021 is a proven upgrade for the BMW F32 428i owner who wants quality, looks and everyday refinement.

Professional installation

Want it fitted properly and want advice on the 435i M Sport rear valance requirement? MJ Modifications offers expert installation in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.

Quick reference

• Brand: Milltek Sport
• Product type: From-cat back, resonated, twin outlet, titanium finishers
• Application: BMW F32 428i Coupe, N20, automatic, 2014 to 2020, without tow bar
• Part number: SSXBM1021
• Requirement: BMW 435i M Sport rear valance
• Material: T304 stainless steel, mandrel bent

Search-friendly terms

BMW 428i performance system, F32 twin outlet conversion, 4 Series 428i twin pipe upgrade, Milltek SSXBM1021 UK made exhaust, titanium tailpipe finishers BMW, N20 turbo petrol automatic only, M Sport diffuser valance required, resonated centre section for quiet cruising, T304 stainless steel sports exhaust, dual outlet rear section for 4 Series coupe, refined sound no drone.

Upgrade your BMW F32 428i with a UK built system that looks right, sounds right and fits right. Order Milltek SSXBM1021 today.