Nissan R33/RB25DET Billet Idle Air Control Valve (IACV) VR38DETT This allows the turbos to

This allows the turbos to breathe easier giving them the opportunity to create more power

In addition to each Skunk2 project car and race vehicle

In order to achieve a safe and consistent rail pressure

but you can add as an option

Nissan R33/RB25DET Billet Idle Air Control Valve (IACV) VR38DETT This allows the turbos toIntroducing the Outsider Garage Billet Idle Air control Valve for the Nissan RB25DET. Designed around the 3 bolt R33 IACV flange, this billet housing uses a common GM 4 pin Stepper motor that is easy to source and setup. We've also added 6AN ORB inlet threads so you can choose to use a hose fitting or an upgraded AN line. Flows approximately 20% more air than OEM. Why use a 4 pin Stepper vs the OE 2 pin? A 4 pin stepper idle air control (IAC) valve