Best and easiest way to install Valve Stem Seals on Subaru heads. NO SPECIAL TOOLS REQUIRED.

Best and easiest way to install Valve Stem Seals on Subaru heads. NO SPECIAL TOOLS REQUIRED. All you need is a 10mm socket, one of your valves, some WD40 or engine oil and a fresh seal. The tapered end of the valve and the socket ensure that the seal is installed straight the first time every time.