Not really. If you have a muffler shop in the area that can bend pipe, you can have them MAKE you a Y-pipe and tailpipes. The mufflers? Hard to imagine anyone having something that small and be as quiet. Most small mufflers like that are turbo types that are louder than stock.
Saw a cobbled up Monte Carlo SS Walker exhaust system on a 442 in an ad recently, but it looked retarded and I'd never put that on my VIN 9 Olds. The Y pipe front had to be cut off and a cat flange to fit the Olds cat had to be welded on in the front. For that kind of hassle, I'd just have a muffler shop do it up right using your old exhaust as a template.
Be wary of the nay-sayers who complain about the stock system being too restrictive, blah blah blah... because that's all they do. They complain about it, but never have any real, helpful information other than to say change it out to duals. They answer a question that nobody asked. EVERYONE who knows anything about G-bodies already knows that it's not an all out HP releasing system. But it functions perfectly well on the street.
Here's a GN style exhaust. I have no idea what the deal is on this stuff. I do know for an olds, you will have to cut off that front flange and change it to a 2-bolt style for the factory cat. The tailpipes also have brackets on the rising rear side of the pipes welded on. This one seems to have some other type of attaching deal with the tails.
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