The Sniper EFI remote IAC (Idle Air Control) and plug is designed to gain installation clearance on some Sniper EFI 2x4 installations. With select intake manifolds, the distributor housing and IAC valve on the back of the Sniper EFI throttle body are fighting for the same real estate. This plug allows you to use Holley's remote IAC kit which utilizes the factory Sniper EFI wiring and IAC connector to relocate the IAC off of the throttle body for a clean installation. The IAC bracket ensures the IAC valve is securely mounted to the throttle body. The included plug comes with an o-ring, preventing any potential vacuum leaks.