Air Hold Adapter Set Includes 14mm and 18mm Sizes 1/4 NPT Female Thread Use In Spark Plug Holes Black Proform Vehicle Scale Stud Girdles reduce flex and

Stud Girdles reduce flex and part breakage

The PROFORM aluminum power valve remover tool makes power valve removal a snap

With 4 Non-Marring Ends

Fits GM HEI Applications

Air Hold Adapter Set Includes 14mm and 18mm Sizes 1/4 NPT Female Thread Use In Spark Plug Holes Black Proform Vehicle Scale Stud Girdles reduce flex andNow that you have the PROFORM Valve Spring Tester, you will need a set of PROFORM Air Hold Adapters to remove your springs with the heads on the engine. It is a simple 3 step process: screw the air hold adapter into your spark plug hole, attach air fitting, and then an air hose. The air pressure will hold up your valves while you get to work! Sold as one set. Product Details: Air Hold Adapter Set Includes 14mm and 18mm Sizes With 1 4 Inch NPT Female