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I had a Dynomax cat-back kit on an 86 Trans Am that I had. It was a 3 inch mandrel bent pipe with a single 3 inch in/dual 2.5 inch out Super Turbo muffler. The sound was good and the fit was excellent with all the hangers and such in the right places. I'm not sure about their headers since I used a kit from Edelbrock on the car.
if you go to the exhaust forum, a lot of the guys over there really like Dynomax.....flow better supposedly than a Flowmaster, and sound awesome, and last a long time.
