Remus Non-Resonated Valved Cat-Back Exhaust System for BMW 1 Series M140i (F20/F21 LCI, 2015-2018, B58/B58B30) Stainless Steel, Dual 102mm Tips, OE Valve Control, EEC Approved, No GPF

Catback sports system for BMW M140i F20 F21 LCI with factory flap control

Unlock the full character of the B58 turbo straight six with this Austrian-built catback. Featuring a straight-through centre section and valve-controlled rear silencer, it delivers a deep, motorsport-inspired tone when you want it and refined cruising when you do not. It is a premium stainless steel upgrade for the facelift 1 Series M140i that keeps the original flap motors for seamless drive mode integration and daily usability.

Why enthusiasts choose it

• Rich, purposeful soundtrack with the valves open, calm and neighbour-friendly with them shut
• Freer-flowing design for sharper throttle response and a more engaging drive
• Full stainless construction for longevity and corrosion resistance
• Twin 102 mm tailpipes for a bold, OEM plus look
• ECE type approved for road use in the UK and Europe
• Engineered and manufactured in Austria with exceptional fit and finish
• No coding required. Uses the original valve actuators for factory-style operation

Compatibility

• Vehicle: BMW 1 Series M140i
• Chassis: F20 and F21 LCI (facelift)
• Engine: B58/B58B30 3.0 litre turbocharged straight six
• Model years: 2015, 2016, 2017, 2018
• Layout: left and right exit with twin 102 mm outlets
• System: straight-through centre section with valve-controlled rear section

Fitment note: for petrol models without a particulate filter, also known as PPF or GPF.

Tailpipe choices

• 2 x 102 mm angled outlets, straight cut, high gloss chrome
• 2 x 102 mm angled carbon fibre outlets with titanium inner sleeves

What you will notice

Deeper tone at idle, a crisp, assertive note under acceleration and controlled cabin sound on the motorway. With the factory flaps closed, it is civil for early starts. Open them and enjoy an authentic performance sound that lets the B58 sing without unwanted drone.

Loved by our team and our customers

We run these systems on our own cars and our customers consistently praise the precise fit, premium build and addictive tone. If you want a quality, valve-controlled catback that elevates your M140i without compromising everyday use, this is the one.

Professional installation

Want it fitted by specialists? Book installation with MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.

Search-friendly terms

BMW M140i sports exhaust, F20 F21 facelift catback, B58 performance exhaust upgrade, valve-controlled sports system, twin exit 102 mm tips, stainless steel rear section, straight-through centre pipe, OE flap compatible exhaust, ECE approved system, BMW 1 Series M140i sound upgrade, B58B30 exhaust system, BMW M140i performance parts UK, M140i twin tip exhaust, Austrian performance exhaust.