The ATI crankshaft damper is a 6.325-inch steel damper for AMC 304–401 V8 engines, listed for externally balanced applications with a 240-degree OEM weight and three-ring configuration. The entry specifies 6.325 in diameter, steel construction and three rings, supplying the shell and mounting pattern needed for engines that call for the 240° OEM weight external balance setup.
ATI Damper - 6.325in - Steel - AMC 304-401 - V8 - Ext Bal - 240 Deg OEM Weight - 3 Ring