A tune won't help with rasp. The F.I. HFC's are 300CEL, they won't produce rasp. I ran long tubes, the MD Y pipe (with cat) and a tanabe exhaust with no rasp. There is just the slightest hint at warmup. I think the best and most inexpensive route if you're running a Y pipe, is to just add the cat to the Y pipe and run resonated test pipes if it's too loud or has raspy.
$925 for F.I. resonated testpipes and MD Y pipe with HFC
or $950 for F.I. cats and MD Y pipe with resonator.
Guess it's a bit of a wash. At least having it at the Y gives you options to swap it out with a TP/res/cat whenever you want.
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Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI
New Car: Under Construction
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