I’ve heard a lot of chatter about IPD plenums over a few Porsche forums. Some people say they have a moderate improvement some say no improvement at all. I called IPD expressing my hesitation. Upon my discussion with Greg, I was confident that if I ran into any issues, I would be fully refunded. So, I purchased IPD plenum and 74mm throttle body. In the first couple of hours of driving, I didn’t see much difference, but THEN, after the ECU adjusted itself I felt SO much improvement! It picks up much faster across the entire bandwidth. Later on, I had ECU remapped to accommodate the additional airflow. Finally, with IPD plenum, 74mm throttle and remapped ECU, it almost feels as I have 911 in the body of 986, such a massive difference! Any 986 owner would agree that it feels underpowered from the factory, even S modeld. Well, not anymore!!!! Special thanks to Greg for his excellent support, now I have this setup on my sons 986.1 and my 986.2 — HUGE DIFFERENCE!!!!! Regards, Vadim!

The past years my 997.1 has been running like clockwork, more eager and better response from the Tiptronic box. A perfect investment! ?

The IPD Plenum in combination with the GT4 throttle body, headers, high flow cats, exhaust and a tune produced phenomenal results in increased horsepower and torque. Based on Dyno results the Cayman now produces 317 hp to the rear wheels. The throttle response and performance are mostly contributed to the IPD Plenum and GT4 throttle body. I couldn’t be happier! Greg and his team are incredible to work with. Great job IPD!

Easy install, has much better torque and a better driving experience.

Works great, easy install, thanks.

Got plenum for 05 cayenne turbo, I noticed improvement for performance and mileage.

I love the performance improvement. I plan to purchase another plenum for my 2000 911

Made a huge increase in boost

Works Great!!

Nice upgrade to low end torque, throttle response, and sound.