Stone Exhaust BMW B58 F22 F23 M240i OEM Integrated Valved Cat-Back Exhaust System
Transform the sound and response of your BMW M240i with the Stone Exhaust OEM Integrated Valved Cat-Back Exhaust System for the B58 engine. Designed specifically for the BMW 2 Series F22 and F23 M240i and M240i xDrive models, this valved catback exhaust delivers a deeper, sportier tone, precision fitment and daily-drive refinement. Developed using 3D scanning, reverse engineering and in-house dyno testing, it is engineered for performance, reliability and perfect OEM-style integration.
At Nforcd we have installed Stone Exhaust systems on customer cars and the feedback has been overwhelmingly positive. Owners praise the refined, drone-free cruising and the aggressive soundtrack when the valves open. If you want a premium BMW M240i exhaust upgrade with OEM valve control and proven engineering, this is the one to buy.
Why choose this BMW M240i B58 valved catback
- BMW B58 F22 F23 M240i catback with OEM integrated valve control
- Exact OEM fitment achieved via 3D scanning and reverse engineering
- Developed and validated on an in-house dyno for performance and flow
- Eliminates the drone often found on the standard exhaust system
- One piece design with precision mechanical welding
- Option to add Stone Valvetronic System for remote valve control
- Plug and play OBDII controller available with Valvetronic upgrade
- Built with advanced 7 axis CNC bending for optimal roundness and accuracy
OEM Integrated Valve - factory style control
The OEM Integrated Valve configuration retains factory-style operation. Your BMW’s ECU controls the exhaust valve automatically, adjusting the sound and flow based on drive mode and load for the perfect balance of comfort and performance.
Optional Stone Valvetronic System
Prefer full manual control of the exhaust sound. Add the Stone Valvetronic System (single valve) to switch the valve open or closed via the Stone remote controller. This plug and play OBDII solution lets you choose quiet or aggressive soundtrack on demand.
R&D and manufacturing
Stone Exhaust engineers 3D scan OEM components to map diameter, routing and bend angles, then simulate gas flow, heat and pressure zones to optimise performance. Precision 7 axis CNC bending achieves exceptional roundness and consistency to minimise flow disruption. Advanced overlapping and crisscross welding techniques increase penetration and durability at high temperature connection points. The result is a high quality, high precision BMW M240i exhaust system you can trust.
Compatibility - BMW 2 Series B58
- F22 M240i and M240i xDrive 2015+
- F22 LCI M240i and M240i xDrive 2016+
- F23 M240i Convertible and M240i xDrive 2015+
- F23 LCI M240i Convertible and M240i xDrive 2016+
Dyno and sound
Developed and refined using Stone’s in-house dyno and acoustic testing to deliver improved flow with the signature Stone Exhaust sound. Confident, sporty and refined when cruising.
Warranty
Stone Exhaust 2 year warranty.
Part Number
AP526B
Professional fitting
Want this installed by specialists. Nforcd offers professional fitting in Warwickshire. Email Sales@nforcd.com for a quote and booking.
Search friendly terms
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