Agency Power Valved Exhaust System (991 GT3)


Designed to Fit:

  • 2014 - 2016 Porsche 911 GT3 / GT3 RS (991.1)
  • 2016 - 2019 Porsche 911 GT3 / GT3 RS (991.2)

Product Details

Driving the Porsche GT3 is extremely fun with its high revving naturally aspirated power band. However like other Porsche cars, it just does not have that aggressive sports car sound. Especially one for a car that is supposed to be oriented for the track. This is why AP has developed the new Agency Power Valved Exhaust System, which is a direct replacement for the factory muffler.

This Agency Power Valve Exhaust muffler features precision mandrel bent tubes, T303 high quality stainless steel construction, beautiful TIG welds and integrated exhaust valves that allow you to change the sound characteristics of the exhaust with a push of a button.


  • Race inspired exhaust note
  • Improved horsepower and torque
  • Integrated exhaust valves
  • Manufactured using high quality T304 stainless steel
  • TIG welded to perfection
  • Direct bolt-on installation
  • Polished to a mirror like finish


  • Center Muffler with Vacuum Valves
  • Connecting Pipes to OEM Cats or Race Headers
  • Black Tips




About Agency Power

Agency Power Industries LLC was developed out of the need to provide quality, functional, and fashionable racing products. Starting from sway bar endlinks for the Subaru WRX back in 2003, Agency Power now has and in-depth number of parts for cars ranging from Porsche, BMW, Ferrari, Subaru, Mitsubishi, Nissan and many more. Based out of Gilbert, Arizona, Agency Power has established itself as one the core aftermarket companies for niche tuner products. Agency Power is constantly developing new functional and race proven products. With dealers worldwide, the AP brand is recognized and trusted. Beyond the USA, Agency Power can be found in regions such as Singapore, Canada, Australia, South Africa, Russia, United Kingdom, and other parts of the EU.

Innovative products such as multi adjustable control arms, valvetronic exhaust systems, and carbon fiber intakes kits, give Agency Power an edge to truly make a difference on your performance vehicle.  Agency Power manufacturers its products only after in-depth product testing, racing, and quality checks are completed. Products like our full titanium Porsche exhausts, Ford Focus ST intercooler, and FRS/BRZ control arms are at the front of the competition. AP parts have been featured in magazines, videos, and customer competition events worldwide.