This turbo boost leak tester kit is designed specifically to check the sealing integrity of the turbocharger itself. The kit includes a 0-30 psi low-pressure gauge, a 3" 6061 aluminum end cap, and a 4" silicone coupler. It can be used to seal the compressor or turbine outlet of the turbo, allowing confident testing for leaks in internal components such as the turbo shaft seal and wastegate valve seats. It is an ideal tool for turbo repair and performance diagnostics. | Vevor | | Turbo Boost Leak Tester 4", 3" 6061 Aluminum End Cap, 0-30 PSI Adapter Gauge Range, Check Test Intake Charge Pipe | Black,Green | Black/Green | Best Buy