Stone Exhaust BMW B48 F20 F21 F22 F23 Cat-Back Valvetronic Exhaust for 120i and 220i
Upgrade your BMW 120i or 220i with the Stone Exhaust Cat-Back Valvetronic Exhaust System. Designed specifically for the BMW B48 engine across F20, F21, F22 and F23 platforms, this performance exhaust delivers OEM fitment, a deep refined tone with no drone, and real-world gains proven on Stone’s in-house dyno. If you are searching for a BMW 120i exhaust, BMW 220i exhaust, BMW F20 catback, BMW F22 cat-back, BMW B48 performance exhaust or a valved exhaust for 1 Series and 2 Series, this is the premium solution.
Stone Exhaust engineers start with 3D scanning and reverse engineering of the OEM system to guarantee precise alignment and 100% OEM fitment. The result is a plug-and-play cat-back that enhances flow, sharpens throttle response and delivers the signature Stone sound. With the valves closed you get a subtle, daily-friendly tone. Open the valves and unleash an aggressive, motorsport-inspired soundtrack.
Why choose this BMW B48 cat-back exhaust
- OEM integrated valve control via your BMW ECU for factory-style operation
- Optional Stone Valvetronic System (single valve) for remote valve control using the plug-and-play OBDII controller
- One-piece design and precision mechanical welding for strength and reliability
- In-house R&D with 3D scanning and reverse engineering for perfect OEM fit
- Dyno developed to improve performance while eliminating cabin drone
- Designed for BMW 120i exhaust upgrade and BMW 220i exhaust upgrade on the B48 platform
Real results. Great sound.
Developed and tested on the dyno, this BMW B48 catback improves flow and enhances power delivery. The Stone signature tone is crisp and sporty when the valves are open and calm on the motorway when closed. We have fitted and used these systems at Nforcd, and our customers consistently praise the fitment, build quality and the valve-controlled sound.
Compatibility
Engine: BMW B48
BMW 1 Series
- F20 LCI 120i (2014+)
- F21 LCI 120i (2014+)
BMW 2 Series
- F22 220i (2012+)
- F22 LCI 220i (2016+)
- F23 220i (2014+)
- F23 LCI 220i (2016+)
Part numbers
- AP524A – requires M140i or M240i bumper
- AP524B – requires M140i or M240i bumper
Stone Valvetronic System
Add the Stone Valvetronic System (single valve) to control exhaust valves remotely via the Stone remote controller. The kit includes a plug-and-play OBDII controller for simple installation.
R&D and manufacturing
- 3D scanning of OEM components to map pipe diameter, routing and bend angles for the B48 exhaust system
- Flow, thermal and pressure simulations to optimise performance
- 7-axis CNC bending for exceptional roundness and accuracy
- Crisscross and overlapping welding techniques for high temperature durability
- Direct spot welding by mechanical welding arms for consistent penetration and strength
Videos
Warranty
Stone Exhaust 2 Year Warranty.
Professional fitting
For expert installation of your BMW 120i exhaust or BMW 220i exhaust, we offer fitting at Nforcd in Warwickshire. Request a quote: Sales@nforcd.com.
Key search terms
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