gutting stock cats

Zsteve

I would thin a gutted cat would have about the same gains as a test pipe or atleast a HFC. And even if you live in an area where you dont have smog tests, at some point that may change and then you would have to buy a very expensive part to fix that, and if you want to sell your car or trade it in, the volume will tell them that there is some modification and they may not want that and you wont be able to take it back to stock. So I would just buy some test pipes from who ever is cheapest, prolly ERZ, and go with them.

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2010 LS3 C6 Silver coupe corvette