Skunk 2 309050040 Pro Series Throttle Body Complement your Pro Series Throttle Body with a Pro Series Intake Manifold for increased airflow. Not compatible with engines featuring down-flow intake manifolds. Must use Skunk2 Pro Series Intake Manifold or similar. Not compatible with '88-'91 D-series intake manifolds. Must use Skunk2 Pro Series Intake Manifold or similar. Manual Transmission Only