Thermactor Plug

Whether you are capping off an unneeded fluid line, installing a threaded plug into your engine block, or replacing the drain plug in your transmission or engine oil pan, Pit Stop USA has a huge selection of Caps and Plugs at low everyday prices. Choose from several styles of caps and plugs including plastic or aluminum line plugs that are perfect for sealing your system against dirt and debris during engine swaps. Caps and plugs are available in a wide variety of configurations.

Cylinder Head Thermactor Plugs are designed to plug into your heads, to change the thread size to allow you to use your factory accessory drive brackets. These plugs are also used to close off any air passages in your heads.