Skunk2 Tuner Series Honda/Acura (K20/K24/F20C/F22C) DOHC VTEC Alpha Valve Spring Set (Dual Springs)Manufactured exclusively from super clean, chrome silicone wire milled in Japan, Skunk2s Alpha Valve Springs for Honda Acura K series VTEC engines are a product of the companys years of racing and engine building experiences. By using inner and outer springs mated together through a slight interference fit and with differing frequencies, Alpha Valve Springs are able to prevent valve float and maintain valvetrain stability at engine speeds in excess of