SKUNK2 RACING H-SERIES ALPHA VALVE SPRING AND TITANIUM RETAINER KITAlpha Valve Springs Manufactured exclusively from super clean, chrome silicone wire milled in Japan, Skunk2? s Alpha Valve Springs for Honda? s F, H series VTEC engines are a product of the company? s 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