Their is a slight rattle coming from under the SDL, but it doesn't do it all the time. Only does it at idle, soon as the rpms come up it smooths right out. It sounds like a shot cat, but I don't think anything is under there except for a resonator.

Any ideas? Saturday I might put it up on jackstands and poke around. I might wait for it to get worse.

Is there some sort of cat under these things? I think just in the downpipe thats it. If their is its getting cut out.

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2016 Corvette Stingray 2LT
1969 280SE
2023 Ram 1500
2007 Tiara 3200