Nothing wrong with the Magnaflows... However, not all of them are created equal. There are at least two case lengths. The LONGER mufflers are SIGNIFICANTLY quieter. You may even try two mufflers on each side if there's room.
Good Luck!
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Mike Burch
66 mustang real street
302 4-speed 289 heads
10.63 @ 129.3
http://www.mustangworks.com/cgi-bin/moi-display.cgi?220
