COMP CAMS O-W Mod Trct Cntrl 252/256 S-Flt Cam SBC COM12-524-5

1/3-1/2 tracks with tight corners or heavy surface. 327-358 c.i., 11:1, 2/4 BBL gas or alcohol. Premium-quality valve springs, lifters, pushrods recommended. SBC - 1955-57 models have an oiling groove in the rear journal. The listed part numbered cams will not fit these models, so if you require a Camshaft with the oiling groove, please call us, and we will assist you with placing an order.