Agency Power Plenum and 78mm Throttle Body (997.1 Turbo)
Designed to Fit:
- 2007 - 2009 Porsche 911 Turbo
Adding bolt-on horsepower to the 997 Turbo is a continuous quest by many enthusiasts looking for more power. Reverting back to old tuning technologies, Agency Power has developed a larger throttle body and plenum kit for the Porsche 997 Turbo to gain added performance. The point of a larger throttle body is to get in more air. The more air you bring in, the more power you make. The 997 Turbo’s engine intake system works off pulses, so how that air is diverted to either side of the engine is not as important as the volume incoming. The plenum kit includes an OEM Porsche Cayenne Turbo throttle body (part# 94860511503) which is a direct bolt on and plug in for the electronic throttle control with no modifications needed. This throttle body has a 77.64mm inner diameter compared to the stock one of 75.64mm. We chose to go with this smaller diameter throttle body to give the car more low end horsepower and torque. If the diameter of the throttle body is too big, it will increase turbo lag and performance gains will only be made at the mid to top end RPM range. Since most 997 Turbo users drive their car on the street and track, we developed this product to substantially increase throttle response and improve “usable” power.
The Agency Power plenum kit is made using high quality 6061 aluminum that has been TIG welded and pressure tested in a T shape to mimic the OEM design. The CNC machined 4 bolt throttle body flange features a groove to accompany a rubber o-ring to ensure a secure and sealed fit with the OEM Porsche Cayenne throttle body. The T plenum features the necessary fittings for stock vacuum hoses and breather lines and includes a 1 way check valve needed. Each T plenum is powder coated gloss black for an OEM look and includes new silicone couplers in black and worm clamps to secure it to the factory intake manifolds. The installation of the plenum requires removal of the factory airbox and Y pipe to access the component.
Installation of the Agency Power plenum kit DOES NOT require the ECU to be flashed. The factory ECU will adjust accordingly to the change in throttle body diameter. However, corresponding mods including an ECU flash will only bring out additional power. As it stands alone, the plenum kit will add a bolt on 20 wheel horsepower to your Porsche 997 Turbo. As tested on a VR700 kit, the plenum added nearly 45 horsepower and 60 ft/lbs of torque. Made in the USA.
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.