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This is a slip collar made from billet alum. to be used on the Mallory SBC and BBC mag drive bases and allows adjustability when using different deck height blocks. Simply loosen the .125" steel set screws and set your height. Collar has a 1.250" center hole and two set screws with one pinch bolt. Collar is .440" thick, with a .125" step that is turned down to 1.390" O.D. This fits all of our Chevy Lower drive shanks.
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🇺🇸 Ship from USA · On Agora since 2026
$48.00