TNEER Valvetronic Exhaust System for Mercedes-Benz C63 / S W205 2015-2023
(Fits- Mercedes-Benz C63 / S W205 2015-2023)
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TNEER Valvetronic Exhaust System for Mercedes-Benz C63 / S W205 2015-2023
The Mercedes-Benz C63 AMG W205 is built around a front-mounted 4.0-litre twin-turbocharged V8 producing 469 horsepower in the standard C63 and 503 horsepower in the C63 S, the M177 engine that replaced the M156 naturally aspirated V8 of the W204 generation. The forced-induction transition brought increased output and improved efficiency to the C63 platform while introducing a fundamentally different exhaust system design requirement, where back pressure management downstream of the turbocharger outlets and thermal handling under sustained load replace the naturally aspirated breathing efficiency considerations of the previous generation. The W205's front-engine rear-wheel drive architecture and extended primary exhaust runs create routing requirements specific to the platform. TNEER engineers this complete valvetronic system specifically for the C63 AMG W205, addressing the full exhaust path from the front pipe through the mid X-pipe to the valvetronic rear mufflers in a single cohesive system built from high-grade stainless steel throughout.
Each section is formed from single-piece high-grade stainless-steel tubing using robotic pipe bending technology, producing continuous tube geometry throughout the complete system without the weld joints and flow disruptions of multi-segment construction. The front pipe addresses the primary exhaust path from the M177's manifold outlets, establishing the flow characteristics that carry through the remainder of the system. The mid X-pipe cross-links both exhaust banks at the mid-system junction, balancing pulse energy between the V8's cylinder groups. On a twin-turbocharged V8 platform, mid-system scavenging through an X-pipe contributes to exhaust flow efficiency and tonal coherence across the rev range, allowing the full character of the C63's V8 to express itself more completely through the system at every engine speed. The system installs to all factory mounting locations, requiring no structural modification and maintaining correct chassis alignment throughout.
The valvetronic rear mufflers are managed through the TACS, TNEER's proprietary App Control System, which gives the driver full manual authority over valve position through a dedicated application interface independent of driving mode or vehicle operating condition. Valves closed, the system maintains a composed tone appropriate for road use while presenting more of the twin-turbocharged V8's character than the factory exhaust allows at any throttle position. Valves open through the TACS, the full acoustic output of the C63 or C63 S V8 is unobstructed and responds directly to throttle input and engine speed. The tonal difference between the standard C63 and C63 S at full output reflects each variant's specific state of tune and boost calibration, and the TACS makes that acoustic experience available on demand at any time regardless of driving mode on every drive.
Optional Downpipe Configurations
For owners who want to address the primary restriction point in the exhaust path beyond what the front pipe and X-pipe provide, TNEER offers two downpipe specifications that deliver meaningful performance and acoustic improvement to the complete system.
- The race downpipes remove the factory catalytic converters immediately downstream of the turbocharger outlets, where back pressure reduction has the most direct effect on turbine behavior, spool characteristics, and mid-range torque delivery. On the M177's twin-turbocharged V8 architecture, the relationship between downstream restriction and turbocharger efficiency is immediate and measurable at every point in the rev range. These components are intended for closed course and off-road use.
- The 200-cell sport downpipes retain a high-flow catalytic substrate in place of the factory units, reducing restriction significantly while maintaining a level of emissions compliance appropriate for street-driven builds. For C63 AMG W205 owners who require a balance between full-system performance and daily usability, the 200-cell specification delivers a substantive upgrade within a practical operating profile.
All downpipe components are fabricated from high-grade stainless steel and engineered to the same fitment standard as the remainder of the complete system.
About TNEER:
TNEER is built around a single engineering conviction: the exhaust system is not a peripheral component. It is the primary interface between the engine and the driver's experience of it. Every system TNEER produces is developed to bring out the true voice of the engine it is built for, improving exhaust flow and delivering a distinct tone that is mechanical, raw, and directly connected to the character of the car.
The manufacturing process that defines TNEER's fitment standard is their high-tech robotic pipe bending technology. Rather than fabricating exhaust routing from multiple welded sections, TNEER forms each tube from a single continuous piece, bending high-grade material to navigate the spatial constraints of each specific engine bay without the diameter reductions, flow disruptions, and structural inconsistencies that welded multi-piece construction introduces. The result is an exhaust system with continuous tube geometry, perfect fitment to the platform it is built for, and no compromises in the routing that precision bending makes unnecessary.
For enthusiasts who regard sound and performance as inseparable elements of the driving experience, TNEER engineers each system to deliver both from the first throttle input.
Note:
- Downpipes are not CARB certified and may not be legal for use on emissions controlled vehicles; intended for off road use only.
- ECU tuning may be required due to removal of factory catalytic converters.
Fitment:
- Mercedes-Benz C63 W205 2015-2023
- Mercedes-Benz C63 S W205 2015-2023
- Does not fit convertible