Restrictive Mufflers

The flow rate drops a few per cent. But since A-bodies need offset center, not much you can do if you want a good fit. The flow change is not as drastic as you would think and stock, or slightly modified engines, can't tell the difference.

Since the stock type mufflers flow in the 35 to 40% of a straight pipe range and the typical Super Turbos are in the 70% range, you can see why a per cent or two here and there will not be noticeable.

Tom