996 Carrera 3.4L (98-99) Cable Throttle: HP Gains 28 / Torque Gains 26 Utilizes factory 74mm TB
The 996 did not mark the beginning of a new Porsche chapter, it marked the beginning of a new Porsche book. The prolific 911 was baptized and emerged water cooled, leaving the legendary air cooled engine to live in Porsche history.
The total and complete redesign of the 911 engine was fitted with the vintage plastic "T" style air distributor that Porsche has used since the early 911 days. This intake system was found on virtually all 911 Carrera's until the arrival of the DFI cars in 2009.
The unique, innovative and patented design of the IPD Plenum employs a "Y" design that improves performance by channeling air left and right to the cylinder banks more efficiently. This design reduces air flow turbulence and increases air flow velocity resulting in substantial power gains throughout the entire rpm band.
The IPD plenum not only delivers impressive power and torque increases but also creates a more linear power and torque band. Tiptronic customers even claim considerable improvements with more positive shifting after installing the IPD Plenums.
Porsche introduced all 996 C2's with conventional cable throttles while all C4's were equipped with E-gas throttles. This was for the model year 98 in Europe and 99 in the US.
The IPD "Y" designed Cable plenum is a direct factory replacement of the OE "T" style air distributor. The IPD Plenum provides impressive max horsepower gains of 28 in the mid range and an additional 12 horsepower on top.
The IPD Plenum is the absolute single best modification that can be installed on these early under powered 996 Carreras and will transform your Porsche driving experience.
Installation is relatively easy and straight forward for mechanically inclined DIY customers although IPD strongly recommends having a qualified Porsche technician perform any IPD Plenum installation.
To confirm whether your Porsche is a Cable or E-gas throttle simply look at your throttle body for either a black electronic module (E-Gas) or a conventional spring / cable throttle control.