Long story short, stock 85 Mustang had a Dynomax catback on it when I got it. The sound wasn't bad, but they cheapened out and put non-polished tips on it. I recently bought a set of Flowmaster polished tips to put on it off Craigslist. Now I reconsidering if I should put a later offroad Hpipe and true duals, so it's 2 1/2" all the way. Realizing, I'll also have to get a double hump crossmember.
Is there any performance gains on a stock motor, or is it a huge waste of money to go true duals? I've seen few threads, but they are conflicting in responses.
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