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Remus Valved Axle-Back Sports Exhaust Rear Silencer/Back Box Muffler for BMW M140i 1 Series F20/F21 LCI (2015-2018) – B58, OE Flap Control, Stainless Steel, ECE Approved, Non-OPF/GPF, 2x102mm Tips (Chrome or Carbon)
Remus Valved Axle-Back Sports Exhaust Rear Silencer/Back Box Muffler for BMW M140i 1 Series F20/F21 LCI (2015-2018) – B58, OE Flap Control, Stainless Steel, ECE Approved, Non-OPF/GPF, 2x102mm Tips (Chrome or Carbon)
Heads-up on cancellations & returns: if you cancel an order or return an item, you won't get back 100% of what you paid. We apply a 10% restocking fee, the outbound shipping is non-refundable, and we have to pass on Shopify / PayPal payment processing fees; these aren't returned to us when we refund you. International orders also lose on exchange-rate spread in both directions. If the original packaging is damaged or missing, a reboxing charge applies. For international orders specifically, if you refuse to pay our shipping invoice or supply a prepaid label after placing the order, the same deductions apply. We're upfront about this — please be sure of your purchase before ordering.
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Remus sport rear box for BMW M140i F20 F21 facelift
Give your M140i the soundtrack it deserves with the Remus flap-controlled rear section. This premium Austrian-made stainless system replaces the factory back box and keeps the original drive-mode flap operation, delivering a deep, aggressive tone in Sport and a refined, neighbour-friendly note in Comfort. Expect sharper response, reduced back pressure and a perfect, bolt-on fit tailored for the B58 straight-six 1 Series.
Highlights
- Uses factory flap control for seamless integration with OEM drive modes
- Muscular, motorsport-inspired soundtrack under load with calm cruising when you want it
- Low back pressure design and lightweight construction for performance and drivability
- Austrian craftsmanship, 100 percent stainless construction with shot-blasted finish
- Precision fitment for F20 and F21 facelift models with the B58 engine
- ECE type approval for road use where applicable
Compatibility
- Vehicle: BMW 1 Series M140i
- Chassis: F20 and F21 facelift (2015 to 2018)
- Engine: B58B30
- Layout: left and right sports silencers with integrated flaps using factory control
- Note: for non-OPF non-GPF vehicles only
Tailpipe choices
- Twin 102 mm angled, straight-cut chrome outlets
- Twin 102 mm carbon sleeves with titanium inner sections
Real-world results
We have installed this Remus rear section on customer M140i builds and the feedback is consistently excellent: premium finish, spot-on alignment, and a rich, turbo-six character without drone. It is a standout upgrade for drivers seeking a high-quality back box that keeps OE functionality while elevating sound and presence.
Professional fitting
Want it installed properly first time? Book fitting with MJ Modifications in Warwickshire. Request a quotation and availability at info@mjmodifications.co.uk.
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