Agency Power Cat-less Race Headers (991.1 Carrera)


Designed to Fit:

  • 2012 - 2016 Porsche 911 Carrera
  • 2012 - 2016 Porsche 911 Carrera S

Product Details

AP's newest product for the Porsche 991 Carrera is these high flow catless race headers. These headers are a big change in design compared to stock which now feature a 3 into 1 merge collector on either bank. The all stainless steel headers have an equal length design to improve the flow from the engine. Available as catless only, we did initial tests with cats. To keep their modular focus, these headers are a direct OEM replacement. They allow you to run the stock main muffler and secondary mufflers or use our secondary bypass pipes.

The main objective was to gain power that the 991 was missing in certain areas of the curve. So having a baseline of the car stock with around 342.8hp, we gave these bad boys a run.  An immediate difference was the sound. These headers really enhanced the sound of the 3.8L DFI engine. It was very GT3 sounding. When lifting off the throttle, it gave a little bit of back rumble. Without knowing the numbers, the dyno runs could be audibly and noticeably felt smoother through the RPMs. Once they finished their 3 runs, they looked at the graph and were quite amazed. Stock, the car has a very lumpy power curve. With AP's special 3 to 1 merge collector and equal length tube design, the power band became extremely linear and consistent with no hesitation or issues. In some areas of the curve it gained 30ft/lbs of torque! The Agency Power 991 Carrera Headers gained a peak of 11HP and 12ft/lbs of torque.

To help prevent a check engine light, we have included a O2 bung spacer.  This raises the sensor out of the exhaust stream.  However without tuning or the ability to raise the secondary O2 limits, you will most likely have a check engine light.

These headers fit both the Porsche 991 Carrera and Carrera S from 12-15.  Catless available ONLY.  Available in all stainless or black ceramic coated.



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.