The first of its kind, Skunk2’s Black Anodized Billet VTEC Solenoid Housing is designed to be used with the 2.0L K20A, K20A2, K20A3, K20Z, and K20Z3 or K24A2 engines/ cylinder heads and is compatible with Honda’s original pressure sensor, solenoid internals, and gasket. VTEC Solenoid Housings for Honda's K Series VTEC engines are manufactured from 6061 billet aluminum, anodized exclusively in Skunk2's Hard or Black finishes for good looks and corrosion resistance.