Remus Axle-Back Rear Silencer/Back Box/Muffler Performance/Sport Exhaust for BMW 4 Series 420xd xDrive F32/F36 2013+, Quad Exit 4x76mm Tailpipes (Stainless Steel), ECE/EEC Approved, Non-OPF/GPF, Coupe & Gran Coupe Diesel

Quad-Exit Back Box Upgrade for BMW 4 Series 420xd xDrive F32 F36

Transform the tone and look of your BMW 4 Series 420xd xDrive with this Austrian-built rear section. Crafted from premium stainless steel with a shot-blasted finish, it delivers a deeper, motorsport-inspired soundtrack and a sharper, more responsive feel thanks to low restriction flow. The precision fit on the F32 Coupé and F36 Gran Coupé is outstanding, and the quad 76 mm outlets give a purposeful, high-end appearance on the road.

ECE type-approved for road use and designed for cars without a particulate filter, this axle section brings everyday refinement with an engaging, sporty note when you want it. We have fitted this setup on our own vehicles and many customer cars and the feedback on sound quality, finish and fit has been superb.

Why enthusiasts choose this system

• Sporty exhaust tone with refined cruising manners
• Stainless steel construction with shot-peened surface
• Low restriction design for a more responsive drive
• Lightweight layout compared with many OE assemblies
• Perfect alignment and OE-style mounting for F32 and F36
• Handmade in Austria with exceptional attention to detail
• ECE homologated for road legality

Vehicle suitability

• Brand: BMW
• Series: 4 Series
• Chassis: F32 Coupé / F36 Gran Coupé
• Model: 420xd xDrive, 135 kW
• Year: 2013 onwards

Finish options

• Quad 76 mm rolled edge, chrome
• Quad 76 mm black chrome

Fitting and support

For the best alignment and sound, we recommend professional installation. MJ Modifications offers fitting at our workshop in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Important notes

• For vehicles without GPF/OPF only.

What you can expect

Stronger presence, cleaner tailpipe aesthetics and a richer diesel soundtrack, all while keeping cabin comfort in check. Customers love the premium build, the easy bolt-on nature and the way the quad exits transform the rear profile.

Search-friendly phrases

BMW F32 420xd quad exit back box, BMW F36 Gran Coupé 420xd performance muffler, BMW 4 Series 420xd xDrive rear section upgrade, quad 76 mm exhaust tips BMW 4 Series, black chrome tail trims BMW F32, rolled edge tips BMW F36, stainless sports backbox BMW diesel xDrive, Austrian made exhaust BMW 420xd, ECE type approved rear box BMW, non OPF rear section BMW diesel, BMW 420xd quad pipes upgrade, BMW F32 F36 diesel sound upgrade, performance rear box 4x76 BMW 4 Series, BMW 420xd xDrive quad outlet muffler, BMW 4 Series rear section stainless steel, BMW 420xd sports exhaust tone, BMW F32 F36 quad tailpipe system, BMW 4 Series diesel axle section upgrade, BMW xDrive 420xd quad exits, BMW 4 Series rear box with black chrome tips.