Introducing our Brass Compressor Housing Boost adapter. These adapters are used commonly in the Garrett series Turbochargers like the T2, T25, T28, T3, T34 & T4 although it fits many other applications. These are used when needing to replace or introduce vacuum lines to the turbocharger compressor housing. They are very easy to install by just screwing them into the turbo being careful not to overtighten to prevent issues. Being AN4 to 1/8npt these are mainly used for oil feeds/ drains / intake manifolds / water lines / boost lines.