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!

Terrific craftsmanship

excellent instructions for installation, easy install overall. The throttle response and engine response has improved drastically, I highly recommend.

Best upgrade yet!

Lots of improvement to throttle and power.

Love it, it is a must have upgrade.

Great product made in USA, customer service is great!

The IPD plenum transformed my car.

I noticed a meaningful difference after I installed the IPD plenum and throttle body

Love the free flowing response, reduced lag, and sound upgrade