Gen4 WG38/40/45/50L HP 30 PSI Outer Spring Brown/RedGen4 WG38 40 45 50L HP 30 PSI Outer Spring Brown Red Upgrade your turbo setup with the Gen4 WG38 40 45 50L HP 30 PSI Outer Spring Brown Red, a genuine Turbosmart wastegate designed for precise boost control, thermal stability and long term reliability. Turbosmart's WG38 40 45 HP 30 PSI Outer Spring Brown Red is a must have for external wastegate setups. This spring provides the ideal boost pressure for any turbocharger, ensuring consistent and