I'm getting my Twin 1 installed this week and I have no clue what I should do with the stock cat-back. There's no problems with it, works fine, tips look nice. Is it even worth trying to sell? If so how much could I get for it? The only reason I could think of someone needing a stock exhaust is if they're returning their car back to stock. I don't have a garage or a shed so I can't just hold on to it, so maybe you guys have some suggestions.
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