Street Performer Retainer (Single Spring) Our Street Performer Retainers are an excellent OEM replacement that matches our street performer valve springs perfectly. If you have a mild street motor that doesn't need anything exotic in the valvetrain,...

Pro Titanium Retainers LC Engineering offers CNC machined retainers made from high strength, heat-treated titanium alloy. Designed to add strength while offering weight reduction. Perfect for high RPM, street, and race applications. NOTE: These...

Pro Titanium Retainer (Dual Spring) LC Engineering offers CNC machined retainers made from high strength, heat-treated titanium alloy. Designed to add strength while offering weight reduction. Perfect for high RPM, street, and race applications. It...