TNEER Valvetronic Exhaust System for Porsche 911 Turbo / S (991.1/991.2) 2013-2019
(Fits- Porsche 911 Turbo / S (991.1/991.2) 2013-2019)
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TNEER Valvetronic Exhaust System for Porsche 911 Turbo / S (991.1/991.2) 2013-2019
The Porsche 911 Turbo and Turbo S across the 991.1 and 991.2 generations share the same fundamental twin-turbocharged flat-six rear-engine architecture while representing two distinct stages of development. The 991.1 Turbo and Turbo S produce 520 and 560 horsepower respectively from a 3.8-litre twin-turbocharged flat-six, while the 991.2 generation raises those figures to 540 and 580 horsepower through revised turbocharger specification, updated engine management, and improved thermal management. Both generations present the same fundamental exhaust system design requirements centered on back pressure management downstream of the turbocharger outlets and thermal handling under the sustained elevated loads that a high-output twin-turbocharged flat-six places on the exhaust system. TNEER engineers this valvetronic system to fit both the 991.1 and 991.2 Turbo and Turbo S, with tube routing and mounting geometry developed to the rear-engine chassis layout shared across both generations.
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 high-output twin-turbocharged platform across both generations, 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 on both the 991.1 and 991.2 Turbo and Turbo S, requiring no structural modification and maintaining correct chassis alignment throughout.
The valvetronic muffler gives the driver direct control over acoustic output from a single system. Valves closed, the system maintains a composed tone appropriate for road use while presenting more of the twin-turbocharged flat-six's character than the factory exhaust allows at any throttle position. Valves open, the full acoustic output of the Turbo or Turbo S is unobstructed and responds directly to throttle input and engine speed across both generations. The tonal difference between the Turbo and Turbo S at full output reflects each variant's specific state of tune and boost calibration, and the valvetronic system makes that acoustic experience available on demand on every drive.
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 across both the 991.1 and 991.2 generations.
- 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 520 to 580 horsepower across the two generations, 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 991.1 and 991.2 Turbo and Turbo S 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 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 911 991.1 Turbo 2013-2016
- Porsche 911 991.1 Turbo S 2013-2016
- Porsche 911 991.2 Turbo 2017-2019
- Porsche 911 991.2 Turbo S 2017-2019