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Hey,
You can see my mods below. My question is Could I add TPIS long tube coated headers to my LT4 with corsa catback and keep my cats?
Also what would I gain from this? Would it change the sound of the car?
I have heard I would need long tubes headers because short tubes would make no difference.
Gonzo
You can't keep factory cats with long tubes. Howver, you can add bullet cats. You will need to do some minor fabrication to get the headers to the cat back, but it is not difficult. Any muffler shop could do it for a very reasonable price.