Rear Brake Drum Casting #3841177
 

Nice mint original rear 9 1/2" x 2" GM brake drum casting # 3841177. Popular drum for 67-70 Camaros,Chevy IIs and Novas. This drum has been glass beaded and primered. Factory new diameter is 9.500. It was then machined to a dimension of 9.512. The maximum factory allowable dimension is 9.560. This drum is only .012 larger than factory new. This drum has only been machined once in it's lifetime. The exterior casting is smooth with a perfect legible casting #. Only one adjuster hole has been knocked out. $55.00 plus shipping. Jim. 413-262-3445.