Turbosmart Internal Wastegate Actuator provides better turbo response and greater sensitivity when managing boost pressures. We’ve taken the proven technology from our WG38, 40 and 45mm External Wastegates and applied it to the Internal Wastegate Actuator. FEATURES: Silicone diaphragm with Nomex reinforcement to withstand high temperatures. High grade, billet aluminum construction. Stainless steel rods and connecting clevis for corrosion resistance. Locking Collar design cap allows for quick spring changes (Options from 3psi to 26psi avaialble). Ideal for use with any Turbosmart boost controller.