TNEER Valvetronic Exhaust System for Mercedes-Benz AMG C190 GT-R 4.0T 2017-2021
(Fits- Mercedes-Benz AMG C190 GT-R 4.0T 2017-2021)
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TNEER Valvetronic Exhaust System for Mercedes-Benz AMG C190 GT-R 4.0T 2017-2021
The Mercedes-AMG GT-R is the most track-focused expression of the C190 platform, extracting 577 horsepower from the 4.0-litre twin-turbocharged M178 V8 through revised turbochargers, updated engine management, and an exhaust system specifically tuned for the GT-R's performance envelope. The GT-R's wider body, active aerodynamics, rear-wheel steering, and track-derived suspension calibration establish it as a fundamentally different machine from the standard GT and GT S, with every system on the car developed around the GT-R's circuit performance intent. The exhaust system on the GT-R is a more consequential component than on the standard C190 variants, where the car's specific state of tune and its overall performance ceiling place greater demands on exhaust flow efficiency and acoustic character. TNEER engineers this valvetronic system specifically for the AMG GT-R C190, with mid X-pipe placement and mounting geometry developed to the exact transaxle chassis layout of the platform.
Each section is formed from single-piece high-grade stainless-steel tubing using robotic pipe bending technology, producing continuous tube geometry throughout the system without the weld joints and flow disruptions of multi-segment construction. The mid X-pipe cross-links both exhaust banks at the mid-system junction, balancing pulse energy between the V8's cylinder groups. On the GT-R's twin-turbocharged V8 at its specific 577 horsepower state of tune, 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 M178 at GT-R specification 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 ECU-controlled valvetronic rear mufflers manage acoustic output through the GT-R's existing AMG vehicle architecture without secondary controllers or aftermarket modules. 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, the full acoustic output of the GT-R's M178 V8 at 577 horsepower is unobstructed and responds directly to throttle input and engine speed. The GT-R's M178 at this state of tune produces a distinct acoustic character at full throttle that is immediately differentiated from the standard GT and GT S, reflecting the revised turbocharger specification, higher output calibration, and the GT-R's overall performance intent. This system presents that character without the attenuation the factory exhaust imposes, on every drive and on every circuit lap.
Optional Downpipe Configurations
For owners who want to address the primary restriction point in the exhaust path, TNEER offers two downpipe specifications that deliver meaningful performance and acoustic improvement beyond what the mid X-pipe and valvetronic muffler system alone provides.
- 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 a platform producing 577 horsepower from a twin-turbocharged V8 specifically developed for track performance, 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 AMG GT-R C190 owners who require a balance between full-system performance and road usability, the 200-cell specification delivers a substantive upgrade within a practical operating profile consistent with the GT-R's dual street and track use character.
All downpipe components are fabricated from high-grade stainless steel and engineered to the same fitment standard as the valvetronic muffler 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 AMG C190 GT-R 4.0T 2017-2021