SKUNK2 HARD BILLET SOLENOID HONDA H-SERIES VTECThe first of its kind, Skunk2s Hard Anodized Billet VTEC Solenoid Housing is designed to be used with the 2. 0L H22A and F20B engines cylinder heads and is compatible with Hondas original pressure sensor, solenoid internals, and gasket. VTEC Solenoid Housings for Honda's H Series VTEC engines are manufactured from 6061 billet aluminum, anodized exclusively in Skunk2's Hard or Black finishes for good looks and corrosion resistance.