Well, it sounded like a flowmaster on my jeep, plus they are pretty much cheaper versions. Same design in the inside. -I didn't hook the tailpipe up so that's not a problem. -I'm not sure if we do here or not. Would a leaky manifold donut effect it?
Leaky manifold would do it if its bad enough! My buddy had that problem
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I have a 94 w/302. Put a flowmaster on and couldn't tell a diff myself. Took it off and cranked it up with just the 2 cats, same quiet sound. Ordered new y-pipe from summit and a hi-flow cat, reinstalled flowmaster and now I get sound! Seems the two cats are just too restrictive.