thank you! This Yoshimura manifold is considered to be the final type for the CB 500 and 550 FOUR. The number of nodes connected by welding is the smallest, and the exhaust is directed to the right diagonally backwards straight, the baffle is welded and can not be removed. The exhaust port is also smaller than the initial type, and the sound is very quiet. It is so quieter than the normal four mufflers. Purchased as new around 1978. It was 42,000 yen at that time. The overall weight is almost the same as the initial model, less than one normal muffler. The center stand can not be attached.