One option for those who like the sound but doesn't want to give up performance...Add a cutout before the mufflers (after the X pipe), this way you avoid any restriction caused by the mufflers, yet when they are closed to retain the classic flowmaster sound.
Just a thought...
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2002 Camaro SS. 408 LS2. 500+RWHP/480RWTQ. Full UMI RR suspension. Koni/Strano. 295F/315R. 3500#(55/45)
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