The 2.7L Boxster Plenum also utilizes the factory OE 74mm throttle body. This version provides power gains throughout the entire power band as well, especially in the midrange.
 
The Boxster Plenum application is recommended for Boxster enthusiasts looking for considerable performance gains without exceeding certain performance thresholds.
 
The IPD Boxster Plenum will provide the most impressive power gains of any engine upgrade available and will truly transform your Boxster driving experience. The Boxster IPD Plenum is the best Boxster modification on the market and will further complement other mods such as exhaust, software and beyond.