Quickly Locate Leaks Turbo boost leak tester is designed to accurately detect and locate leaks in the turbocharger systems of most cars and light trucks. You can repair leaks in time, restore vehicle performance, improve fuel efficiency and extend engine life. Boost leak tester can also be used to detect leaks in the cooling and emission systems, including anywhere an adapter can be mounted, such as radiators, coolers, hoses and pipe assemblies. It's an essential tool for any automotive enthusiast. 8 Pairs of Stepped Adapters & Good Sealing Performance The adapters are made of premium hard nylon and metal material and can be firmly mounted on different pipes, ensuring good sealing performance. Each adapter features 2 size steps to fit different sizes pipes.