Keep your stock stuff. I put on HFCs and after awhile I didnt like the rasp so I was able to put stock cats back on cuz I saved them. That way I wasnt stuck with a sound I didnt like or payed again for a stock item. By the way I have a pair of ERZ HFCs that only have about 1K miles on them for sale. lets say $150.
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2010 LS3 C6 Silver coupe corvette
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