[wkooiman]

I switched to the Classic Chambered mufflers on my car, and I love them.

I have a Contemporary with a 428 and it had the original mufflers. I didn't measure the flow path, but I'd guess about 1 7/8".

The CC mufflers are 3", 24" long, with packing, and I installed them with the baffles facing forward, as recommended by CC. They are slightly louder than the original restrictive mufflers, but not bad at all. I have a chop saw and a MIG, so it was an easy project.

I also installed O-2 bungs while I was at it. I plan on having them ceramic coated, but I was getting tired of not having my car on the road, so that's for another day.