Cold Air Intake for Acura RSX (2002-2006) Base Model 2.0L Vtec EngineOptimize Airflow and Throttle Response for the Acura RSX K20A3 Who Its For: Designed specifically for 2002 2006 Acura RSX (Base Model) owners running the K20A3 engine family. The Problem: The K20A3 engine is a reliable i VTEC platform, but it is trapped behind a restrictive, heavy factory airbox designed more for silence than performance. This bulky plastic housing creates turbulence and restricts air volume, which often leads to a mushy throttle feel