Stone Exhaust BMW B46, B46D, B48D G20 G21 G22 G23 330i and 430i OEM Integrated Valve Cat Back Exhaust System - OPF Model
Transform your BMW 3 Series and 4 Series with the Stone Exhaust OEM Integrated Valve Cat Back Exhaust System for B46, B46D and B48D engines. Perfect for BMW G20 330i, G21 330i Touring, G22 430i Coupe and G23 430i Convertible, this OPF compatible performance exhaust delivers a deeper tone, sharper response and the authentic Stone signature sound. Designed through 3D scanning and reverse engineering for 100 percent OEM fitment, dyno developed and crafted to eliminate drone, this is the premium BMW 330i exhaust and BMW 430i exhaust upgrade UK enthusiasts search for.
We run Stone Exhaust systems on our own cars and our customers love the quality, fit and refined valved sound. If you want the best BMW G20 330i cat back exhaust or BMW G22 430i cat back exhaust with OPF, this is it.
Why choose this Stone Exhaust cat back for BMW 330i and 430i
- OEM Integrated Valve - uses the factory valve and ECU control for seamless operation
- OPF specific design - ideal for OPF equipped BMW 330i and 430i models
- Optional Stone Valvetronic System - single valve with remote control and plug and play OBDII controller
- 100 percent OEM fitment - 3D scanned and reverse engineered for a direct bolt-on installation
- In-house dyno developed - proven performance with Stone signature exhaust sound
- Eliminates drone found on the standard exhaust system
- One piece design with precision machine welding
- Engineered through 3D scanning, simulation and rigorous R and D
Sound and performance you can feel
Experience a deeper, sportier BMW B48 exhaust note with crisp valve control and day-to-day refinement. The OEM integrated valve keeps things civil when closed and unleashes an aggressive tone when open. Stone’s flow-optimised pipework and advanced fabrication help improve throttle response while removing the factory drone that dulls the drive.
OPF support and OPF delete option
This system is engineered for OPF models. Stone also offers an OPF delete solution that can be included free of charge, allowing installation on OPF equipped cars without triggering error codes, so coding out the OPF warning on the ECU is not required.
Optional Stone Valvetronic System
Add the Stone Valvetronic System single valve for remote control of exhaust valves via the Stone remote controller. The plug and play OBDII controller integrates quickly and cleanly, giving you full control of sound on demand.
Compatibility - B46, B46D, B48D engines
BMW 3 Series
- G20 330i and 330i xDrive
- G21 330i Touring and 330i xDrive Touring
BMW 4 Series
- G22 430i and 430i xDrive Coupe
- G23 430i and 430i xDrive Convertible
- G26 430i and 430i xDrive Gran Coupe
Stone engineering - built for precision and durability
Stone Exhaust has specialised in high performance exhaust systems since 1998. Each system starts with comprehensive 3D scanning of the OEM parts, followed by simulation of gas flow, thermal load and pressure zones to refine routing, diameters and bend geometry for optimal results. The result is a precision fit cat-back that performs.
7 axis CNC bending
With state of the art 7 axis CNC bending, Stone achieves up to 98 percent roundness and minimal outer wall thinning on tight 180 degree bends. This maximises flow, reduces turbulence and prevents weld fracture for long term reliability.
Advanced welding
Crisscross and overlapping weld techniques are used at high stress joints to increase penetration and strength in extreme temperature zones. Direct spot welding by mechanical arms delivers consistent, accurate welds that look as good as they perform.
What you get
- Stone Exhaust OEM Integrated Valve Cat Back Exhaust System for BMW B46, B46D, B48D G20 G21 G22 G23 330i and 430i
- OPF compatible layout with one piece precision construction
- Optional Stone Valvetronic System single valve with remote and OBDII controller available
Fitting and support
Professional fitting available at Nforcd in Warwickshire. For a tailored installation quote, email Sales@nforcd.com.
Part number
AP537AG - dual exit with twin tailpipes, requires original bumper
Warranty
Stone Exhaust 2 year warranty.
Gallery
R and D and manufacturing imagery
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