IPD Plenum 74mm For Porsche Boxster 987 S 3.4L (2009-2012) Models.

The IPD 987.2 Boxster S 3.4L DFI Plenum is a direct bolt-on upgrade that replaces the factory plenum while utilizing all existing hardware, including the OE throttle body. Its advanced design improves airflow by reducing turbulence and increasing intake air velocity, resulting in noticeable gains in both horsepower and torque.

The plenum delivers an additional 12–14 wheel horsepower, with a power curve that remains smooth and linear while providing stronger performance from mid-range to redline. Installation is straightforward for mechanically inclined enthusiasts, though IPD strongly recommends having a trained Porsche technician perform the upgrade.

All IPD Plenums are designed for street-driven vehicles and include a 2-year manufacturer’s warranty against defects. Warranty coverage is void if used off-road or on race tracks.