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The COMP Cams CB 47S 321-R12 camshaft is a Fast Bracket profile for big-inch engines, tuned for strong top-end power with good heads and small nitrous support. It expects 13:1+ compression and 5,000+ rpm stall converters, with capability for small N2O use. Some 1965–66 396 ci BBCs have a rear-journal oiling groove and will not accept listed cams; contact the supplier for the correct part.
COMP Cams Camshaft CB 47S 321-R12
