For your 2v engine go with the4 SLP loudmouth catback, or the spintech cat back kit, they sound unique. I also like the MAC peices for all mustangs personally, they are cheaper and sound just as good.
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Ryan
1990 Mustang GT (In Process)
1993 LX Coupe (Daily Driver, but just choose not to)
2005 Excursion (Big Pig)