Gen4 WG38/40/45/50L HP 10 PSI Inner Spring Brown/OrangeTurbosmart's WG38 40 45 HP 10 PSI Inner Spring Brown Orange is a must have for external wastegate setups. This spring provides the ideal boost pressure for any turbocharger, ensuring consistent and reliable performance even under extreme conditions. Turbosmart's design ensures that this spring will last for years, providing maximum performance with minimal maintenance. With Turbosmart's WG38 40 45 HP 10 PSI Inner Spring Brown Orange, you can trust