I had long tubes and exhaust put on for $425. Should be a lot less for the HFC's though. Just be up front on the process. When they removed my headers, the cats were left on so they haven't played with them yet. Johnny and George are the shop owners. I can PM you their number. They also have a dyno so you can get a baseline and post pulls done if you want.
Edit: on second thought, they did say they didn't charge enough for my install haha, but kept their promise.
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Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI
New Car: Under Construction
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