An absolute must for all applications to stop cam bearing thrust wear when triple or Chevy type springs are used. They create so much load on the camshaft that the helix type gear is loaded all to one side and prematurely wears out the thrust surface of the cam bearing. In fact, on our race engine it wore out the cam bearing in just one race day. (POTL) We often resize these to fit properly and reject the bad ones. Made in the USA. |