'75 318 exhaust help

There are other options that might save you some money. The 553 is typically very expensive. I sell the driver's 368 manifold (large hole) paired with a 360 magnum passenger's manifold (large hole) which saves you money but gives you the same performance. I have a few 623 (smaller 340 manifold) which I sell at a very good price also. The 549 is also very pricey.

treblig