Stone Exhaust BMW B58 G05 G06 OEM Integrated Valved Cat-Back Exhaust System - X5 40i xDrive and X6 40i xDrive
Transform your BMW X5 40i xDrive G05 or BMW X6 40i xDrive G06 with the Stone Exhaust OEM integrated valved cat-back exhaust for the B58 engine. This valved exhaust system delivers the deep, refined BMW B58 exhaust note you want with OEM control and flawless fitment. Developed using 3D scanning, reverse engineering and in-house dyno testing, the Stone cat-back is engineered for performance, precision and everyday drivability.
At Nforcd we have fitted and used this system on customer cars and our own vehicles. Feedback is consistently excellent - crisp cold starts, a rich, sporty tone in Sport modes, and quiet cruising with zero drone when the valve is closed. If you want a premium BMW X5 40i exhaust upgrade or BMW X6 40i exhaust upgrade that looks and behaves like factory but sounds far better, this is the one.
Why choose the Stone OEM Integrated Valved Cat-Back for your BMW B58
- OEM integrated valve control - the factory ECU manages the valve automatically for comfort when you want it and sound when you need it
- Proven performance - developed and validated on Stone’s in-house dyno for genuine power and response gains
- No drone - tuned for a refined highway cruise with a deep, sporty BMW exhaust note under load
- 100 percent OEM fitment - designed from 3D scans for perfect alignment with factory mounts and hardware
- Precision manufacturing - one piece design sections, machine welding, exceptional repeatability and quality
- Optional Stone Valvetronic upgrade - add the single valve remote control kit with plug and play OBDII controller for manual open or close at the touch of a button
- OPF and GPF friendly - free OPF delete module available to prevent error codes on OPF equipped cars with no ECU coding required
Key features
- Stone Valvetronic BMW B58 G05 G06 X5 40i xDrive and X6 40i xDrive cat-back exhaust system
- OEM integration with factory valve control
- Optional Stone Valvetronic System - Single Valve with remote and OBDII controller
- One piece design and machine welding for strength and consistency
- In-house research and development
- 3D scanning and reverse engineering for precision fit
- Dyno developed in house
- Eliminates drone found on the standard exhaust system
OPF delete included on request
Running an OPF or GPF equipped BMW X5 40i or X6 40i G05 or G06 B58 engine car We can include Stone’s OPF delete solution free of charge. It allows this Stone cat-back to be installed on OPF cars without triggering a warning light, so no coding out of OPF related errors is required.
Engineering that makes the difference
- R and D and simulation - Stone models exhaust gas flow, thermal and pressure zones to refine power, tone and comfort
- 7 axis CNC bending - up to 98 percent roundness with outer bore wear held to just 25 percent at 180 degrees, accuracy error under 0.025 mm for exceptional flow and fit
- Advanced welding techniques - crisscross and overlapping welds at high stress joints for durability
- Direct spot welding by mechanical arms - consistent penetration and strength for a finish that looks as good as it performs
Compatibility - BMW B58
- BMW G05 X5 40i xDrive 2017+
- BMW G06 X6 40i xDrive 2018+
Part numbers
- AP542 - BMW G05 X5 40i xDrive
- AP549 - BMW G06 X6 40i xDrive
Fitting and support
We recommend professional installation. Nforcd offers full fitting and setup at our workshop in Warwickshire. Request a quote at Sales@nforcd.com and our team will be happy to help.
Warranty
Stone Exhaust 2 year warranty.
Search terms and buyer keywords
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