Skunk2’s Alpha Series Throttle Bodies are precision die-cast from high-quality materials and include features previously offered only in our Pro Series line, like countersunk, stainless steel mounting bolts, solid brass throttle plates, fully machined bores, and idle adjustment screws for fine tuning. All Skunk2 throttle bodies undergo an extensive design and testing process to produce a throttle body that doesn't just provide more flow but retains smooth drivability and OEM throttle characteristics.