Stone Exhaust Mercedes-Benz AMG M276 W/S/C205 C400 C450 AMG C43 Cat-Back Valvetronic Exhaust System
Transform the sound and response of your Mercedes-Benz C-Class with the Stone Exhaust Cat-Back Valvetronic Exhaust System for the AMG M276 3.0 V6 biturbo platform. Designed for W205 S205 C205 models including C400, C450 AMG and AMG C43, this premium valved cat-back delivers an aggressive Mercedes AMG exhaust note on demand, refined cruising with zero drone and proven performance gains on the Stone in-house dyno. Expect precise OEM fitment, plug and play valve control and a motorsport-inspired tone that makes every drive feel special.
We have supplied this system to many C43 and C450 owners and feedback has been consistently positive. Customers love the quality, the clean fitment and the ability to switch from quiet to loud in seconds.
Why choose Stone Exhaust for your Mercedes C43 C450 C400
- Engineered for Mercedes-Benz AMG M276 W205 S205 C205 C400 C450 AMG C43
- Cat-back valved exhaust for daily comfort and track-ready sound
- Valvetronic remote with ON, OFF and AUTO modes for RPM-based valve control
- Eliminates drone commonly found on the standard exhaust system
- 3D scanned and reverse engineered for 100 percent OEM fitment
- Dyno developed in house for improved flow and performance
- One piece design with precision machine welding
- Plug and play OBDII controller and quick installation
Valvetronic control that works for every drive
The Stone Valvetronic System gives you instant control over exhaust valves via the included remote. Choose ON for the loudest, most engaging AMG sound. Choose OFF for neighbour friendly early starts and relaxed motorway cruising. Choose AUTO to open and close the valves at your chosen RPM for the best of both worlds. The controller connects through the OBDII port for a simple plug and play install.
OPF delete option included
Running an OPF equipped car This system includes an OPF delete solution free of charge. It allows fitment to OPF cars without triggering an error code, so no ECU coding is required.
Built with precision
Stone Exhaust uses 3D scanning and reverse engineering of the OEM Mercedes-Benz exhaust to map diameter, routing and bend angles. A 7 axis CNC bending machine achieves exceptional roundness and accuracy to minimise turbulence and maximise durability. Crisscross and overlapping welding techniques, plus direct spot welding by mechanical arms, increase weld penetration and strength for a long lasting, high quality finish.
Key features at a glance
- STONE Valvetronic Mercedes-Benz AMG M276 W/S/C205 C400 C450 AMG C43
- Valvetronic System with remote ON, OFF and AUTO
- One piece design for optimal flow and fitment
- Plug and play OBDII controller
- Machine welding with advanced techniques for strength
- In house R and D with 3D scanning and simulation
- Dyno developed sound and performance
- Eliminates drone versus the stock exhaust
Compatibility
M276 Engine Mercedes-Benz C-Class
- W205 C400 2014+
- W205 C450 AMG 2015+
- W205 AMG C43 2016+
- S205 C400 2015+
- S205 C450 AMG 2015+
- C205 C400 2015+
- C205 AMG C43 2016+
Installation and fitting
Professional fitting recommended. Nforcd offers expert installation in Warwickshire with care taken to achieve perfect alignment and valve operation. Request a fitting quote at Sales@nforcd.com.
Stone Valvetronic System Installation Video
Part number and warranty
Part Number MP512S
Manufacturer Stone Exhaust
Warranty Stone Exhaust 2 Year Warranty
R and D insights
Stone engineers analyse thermal zones, pressure rise and gas velocity with 3D simulation, then iterate until optimal performance and tone are achieved. Accuracy error is kept extremely tight to ensure consistent OEM level fitment and a clean install every time.
Media
Fitted photos
Sound video
Popular search terms
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