Subaru factory lower intake manifold for increased power output. This is the Spec C version which not only eliminates the butterfly plates and related hardware but also eliminates the divider wall for the asolute minimum flow resistance. Fits top feed injector applications. However, 2.5L applications will require modification of the center holes in the intake manifold due to a slight mismatch in the center hole locations on those models. Includes set of 2 (left and right sides).
Usually ships in 2 to 3 days.
What is a TGV? TGV stands for Tumble Generator Valve. It is an ECU-controlled throttle plate in the lower part of the intake manifold runner that partially closes off the runner. It is used to create air turbulence in the combustion chamber and improve fuel distribution. It is active primarily on startup at idle or low throttle positions. However, even when the plates are fully open they represent a small restriction to the incoming airflow and can hurt performance.
