B-O-P Rear Axles

Before GM consolidated its rear-axle production into what became known as “corporate” axles around 1971, each division placed its own versions underneath the passenger cars it produced. Chevrolet used its own 8.2-inch 10- and 12-bolt axles, while the other divisions used various other axle designs, including one 8.2-inch 10-bolt that saw use under certain Buicks, Oldsmobiles, and Pontiacs, which led to its shorthand moniker, the “B-O-P” 10-bolt. Although the Chevrolet axles often fit under performance models from other divisions (depending on the model), original Buick, Olds, and Pontiac axles that have been reconditioned or upgraded can have advantages over some of the Chevrolet