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Stone Exhaust

Stone Valvetronic Valved Cat-Back (Catback) Exhaust for MINI Cooper S F60 Countryman S & F54 Clubman S 2017+ B48/B48E 2.0T | Remote Switchable Dual Valve | OBD2 Plug & Play | OPF/GPF Safe, No-Drone Twin Exit Sports Exhaust | AP533BS/AP533BGS

Stone Valvetronic Valved Cat-Back (Catback) Exhaust for MINI Cooper S F60 Countryman S & F54 Clubman S 2017+ B48/B48E 2.0T | Remote Switchable Dual Valve | OBD2 Plug & Play | OPF/GPF Safe, No-Drone Twin Exit Sports Exhaust | AP533BS/AP533BGS

£2,427.84
£3,034.80 £2,427.84
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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.

Switchable Sports Cat-Back for MINI Countryman S F60 and Clubman S F54 B48 and B48E

Transform the soundtrack and response of your 2.0 turbo MINI with Stone Exhaust’s switchable, valve-controlled cat back. Purpose built for the B48 and B48E engines in the F60 Countryman S and F54 Clubman S from 2017 onward, this system blends exciting tone with refined cruising, giving you week‑day comfort and week‑end character at the press of a button. We have installed and used this system ourselves and our customers consistently praise the sound quality, the fit and the way the dual valves make the car feel alive without unwanted cabin boom.

Looking for a MINI S performance system, remote valve exhaust, twin exit upgrade, plug in OBD controller, GPF friendly sports exhaust, motorway friendly no drone solution or a premium catback for B48 and B48E engines? This is the one.

Key reasons enthusiasts choose this system

  • Dual valve control with three modes using the supplied remote Open, Close and Auto for quiet neighbourhood starts or full soundtrack on demand
  • OBD II plug and play control module with RPM based logic for automatic valve operation without complex wiring
  • Engineered via 3D scanning and reverse engineering for factory level alignment and hassle free installation
  • Rolling road developed with measurable improvements in flow and response plus that trademark Stone tone
  • Calm, drone free cruising on the motorway with valves shut and a deep, sporty note with valves open
  • GPF and OPF compatible solution available to prevent warning lights with no ECU coding required
  • 7 axis CNC bending for exceptional roundness and smooth gas paths with sub 0.025 mm accuracy
  • Precision welding with overlapping and direct spot techniques for long term durability
  • Twin outlet layout to suit the MINI S rear end aesthetics
  • Backed by a 2 year manufacturer warranty for peace of mind

How the valve control works

Use the remote to choose Open for maximum flow and a rich, aggressive tone, Close for a refined note during daily driving and motorways, or Auto to let RPM based logic handle the valves for you. The plug in OBD module keeps installation simple and reversible while providing smart control.

OPF and GPF support

Running a petrol particulate filter car? A free of charge OPF fix solution is available so OPF equipped vehicles can run this system without throwing a fault. No coding is needed.

Applications

  • MINI F60 Countryman Cooper S 2017 onward
  • MINI F54 Clubman Cooper S 2017 onward
  • Engines B48 and B48E

Part numbers

  • AP533BS for B48
  • AP533BGS for B48E

Fitting and installation

Professional installation available at MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk

Video

Gallery

Stone switchable catback for MINI F60 Countryman S twin outlet by MJ Modifications UK
MINI Clubman S F54 performance catback with valve control by Stone Exhaust
Reverse engineered MINI S exhaust system 3D scanned for perfect fit
Dual valve MINI Cooper S sports exhaust with remote control UK supplier

R and D and build quality

Stone digitises the original MINI system to map diameters, routing and bend geometry, then simulates flow, thermal zones and pressure to optimise performance and sound quality. The 7 axis CNC bending process keeps pipe roundness up to 98 percent and retains bore size even at tight 180 degree bends for minimal restriction. Precision mechanical welding with crisscross and overlapping techniques, plus direct spot welding, creates a strong, long lasting system designed to perform.

3D scanning and flow simulation for MINI B48 exhaust development
Remote control for MINI switchable exhaust with Open Close Auto functions
7 axis CNC mandrel bends for smooth gas flow on MINI B48 catback
Precision welding quality on Stone MINI performance exhaust
Direct spot welding for durability on MINI B48 valved exhaust

Warranty

2 year Stone Exhaust warranty.

Common search terms

MINI S exhaust upgrade, MINI Countryman S F60 sports exhaust, MINI Clubman S F54 catback, B48 performance exhaust system, B48E valve exhaust, remote controlled exhaust MINI, switchable exhaust MINI, twin exit MINI S system, OPF safe exhaust, GPF friendly MINI exhaust, no drone MINI cat back, high flow MINI S exhaust, Stone Exhaust MINI UK, performance exhaust for MINI 2.0 turbo, OBD plug and play valve control, AP533BS, AP533BGS, MJ Modifications MINI fitting Warwickshire.

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