Product Feature: * Application: Commonly used when valve springs or valve stem seals are replaced. * Premium Material: Made of a top quality rubber with brass fitting connections, resistant to high pressure, acid and alkali, corrosion and oil, kinks and abrasion. * Product Features: Comes with two-step fitting for both 14 millimeter and 18 millimeter threads.Heavy duty 12" flexible hose allows easy access to spark plug hole and air supply. * Function: Thread fitting to spark plug hole and other end to air supply. Air pressure helps prevent the valve from falling into the combustion chamber. .
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