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Stone Exhaust

Stone Exhaust AP525B BMW 230i B48 2.0T (F22/F23 2015+) Valved Cat-Back Performance/Sports Exhaust | Switchable Valve, OEM Flap Control | Catback Twin Exit | BMW 2 Series Coupe & Convertible, xDrive Compatible

Stone Exhaust AP525B BMW 230i B48 2.0T (F22/F23 2015+) Valved Cat-Back Performance/Sports Exhaust | Switchable Valve, OEM Flap Control | Catback Twin Exit | BMW 2 Series Coupe & Convertible, xDrive Compatible

£2,112.96
£2,641.20 £2,112.96
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Exhaust System
Tailpipe Finish

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Stone Exhaust AP525B for BMW 2 Series 230i B48 F22 F23

Unlock a richer soundtrack and sharper response from your BMW 230i with Stone’s switchable sports system. This premium cat back upgrade retains factory flap control for quiet cruising and an authentic performance tone on demand, delivering a deeper note with no cabin boom, quicker throttle reactions and proven dyno gains. Built for everyday use and weekend blasts, it is the ideal sound and performance enhancement for B48 powered F22 and F23 models, including xDrive.

At MJ Modifications we have installed multiple Stone systems on customer 2 Series builds, and the feedback has been consistently positive. Fitment is precise, the finish is superb and the driving experience feels more alive without compromising daily comfort.

Key reasons to choose this upgrade

  • Factory ECU controlled exhaust flap for genuine quiet and sport modes
  • Refined motorway manners with no intrusive resonance inside the cabin
  • Sportier tone under load with a clean, aggressive bark when you press on
  • Dyno developed for measurable performance improvements
  • Single piece layout for strength, optimal flow and a straightforward install
  • Engineered from detailed 3D scans for exact BMW fit on F22 and F23 platforms
  • High precision welding and robust construction for longevity under heat
  • Optional Stone Valvetronic add on available for manual valve control

Sound control options

By default the valve is managed by your car’s electronics, mirroring the factory behaviour. If you prefer manual control, add the Stone Valvetronic single valve kit with a plug in OBD controller and remote handset for instant open or closed operation from the driver’s seat.

Engineering that elevates your 230i

  • 3D laser scanning and reverse engineered geometry to optimise pipe sizing, routing and bend radii
  • Flow, thermal and pressure simulation to maximise performance and reliability
  • 7 axis CNC mandrel bending with up to 98 percent roundness and 0.025 mm tolerance to reduce turbulence
  • Overlap and cross welding techniques for excellent penetration and durability
  • Robotic spot welding for consistent, repeatable quality at every joint

Stone Exhaust 3D Scanning and Reverse Engineering for BMW 230i UK

Stone Exhaust 7 Axis CNC Bending - Precision BMW 230i Catback

Stone Exhaust Welding Quality - BMW 230i F22 F23 Catback

Stone Exhaust Direct Spot Welding - BMW 2 Series 230i

Compatibility

BMW 2 Series with the B48 2.0 turbo engine:

  • F22 230i Coupe 2015+
  • F23 230i Convertible 2015+
  • F23 LCI 230i xDrive 2016+

Part number

AP525B requires M140i or M240i rear bumper.

Warranty

Backed by a 2 year Stone Exhaust warranty.

Professional fitting

For a hassle free installation and perfect alignment, book your fitment with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

Search terms enthusiasts use

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