magnaflow mufflers

I ran 3.5" Magnaflow stainless race mufflers on my 9 second 73 DartSport with an X-pipe, it ran 9.90 with the exhaust system and 9.90 with the exhaust system completely removed from the car. The mufflers sounded great on the street, mild, and ran like open headers at the track. They are quality mufflers.