Check the listing for details. SKUNK2 ALPHA VTEC DUAL VALVE SPRINGS & TRC TITANIUM RETAINERS KIT B16 B18c. Condition: New. Listed at 329.99 USD. In stock and Ready to Ship. Skunk2 Alpha Dual Valve Springs WITH TRC TITANIUM RETAINERS- B-series PART# 311-05-1350 Skunk2 is proud to introduce its Alpha Valve Springs. Each kit includes Skunk2’s high-quality dual valve springs that are the result of nearly two decades of racing and engine building experience.Each Alpha Valve Spring is manufactured exclusively from super-clean, chrome-silicone wire milled in Japan. 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 10,000 rpm. 32pc valve spring set Engine applications: B-series VTEC, F-series (S2000), H-series VTEC, K-series