911 1965-83 Mechanical Chain Tensioner Safety Collars

65-232562-1  90110505300   For those Porsche owners who prefer running the original equipment chain tensioners, we very strongly recommend that you install these safety collars. They allow the chain tensioner to function normally until there is a failure and collapse of one of the tensioners. With the safety collar the complete collapse is averted and the tensioner is automatically changed into a mechanical chain tensioner. Kit includes 2 collars.