Skunk2 309-05-0040 Pro-Series Billet 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