TNEER Valvetronic Exhaust System for Porsche 911 991.2 Carrera GTS 2017-2019
(Fits- Porsche 911 991.2 Carrera GTS (PSE) 2017-2019)
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TNEER Valvetronic Exhaust System for Porsche 911 991.2 Carrera GTS 2017-2019
The Porsche 911 991.2 Carrera GTS extracts 450 horsepower from the 3.0-litre twin-turbocharged flat-six through revised intake, exhaust, and engine management calibration that distinguish it as the most performance focused Carrera specification of the 991.2 generation. The GTS specification includes the Porsche Sport Exhaust system as standard, making it the only 991.2 Carrera variant with factory integrated active exhaust valve control built into the PSE architecture from the outset. TNEER engineers this valvetronic system specifically for the 991.2 Carrera GTS, integrating the valvetronic rear muffler directly with the vehicle's existing PSE system rather than replacing or bypassing it.
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. On a twin-turbocharged platform, exhaust gas pressure consistency downstream of the turbine outlets directly influences turbocharger efficiency and mid-range response under sustained load. The system installs to all factory mounting locations, requiring no structural modification and maintaining correct chassis alignment throughout.
The valvetronic rear mufflers operate through the Porsche PSE system, maintaining full integration with the GTS's existing exhaust valve control architecture and drive mode behavior. The PSE integration means valve behavior responds to driving mode selection and throttle input exactly as the factory system intends, with the acoustic improvement delivered through the TNEER muffler rather than through a change in valve control logic. Valves closed, the system maintains a composed tone appropriate for road use while presenting more of the turbocharged flat-six's character than the factory exhaust allows at any throttle position. Valves open through the PSE system, the full acoustic output of the 3.0-litre twin-turbo flat-six at 450 horsepower is unobstructed. As engine speed builds toward the redline, the exhaust note rises with the mechanical precision and urgency of the GTS's specific state of tune operating without exhaust restriction.
Two tip configurations are available to complete the system at the rear fascia. The dual silver tips provide a clean, high polish finish consistent with the GTS's precise aesthetic. The carbon fiber tips present an alternative for owners whose build direction calls for exposed carbon at the rear, complementing both standard and modified 991.2 GTS builds.
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 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 the GTS's twin-turbocharged flat-six at its specific state of tune, 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 991.2 GTS 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 consistent with the GTS's intended 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:
- Porsche 911 991.2 Carrera GTS (PSE) 2017-2019