Skunk2 Pro Series Billet 74mm Throttle Body Silver - Honda K20A, K20A2, K20A3, K20Z1 - 309-05-0090Skunk2 is proud to introduce the 74mm Pro Series Throttle Body for Honda K20A K20A2 K20A3 K20Z1 engines found in the 2002 2005 Civic Si and 2002 2006 RSX Base & Type S chassis. A larger throttle body is key to producing additional power throughout the powerband on modified engines with increased airflow demands and the Skunk2's 70mm Pro Series Throttle Body delivers! Sealed ball bearings, a precision machined throttle plate and a honed oversized bore