Which headers mufflers?

[dhardison]

I've tried the car chemistry inserts as well as the dynatech cones and neither quieted the exhaust one bit, they just changed the tone. I've also tried collector mufflers similar to the Dynomax units and they did help some (maybe a 20% reduction in sound), but it was still WAY too loud to drive on the street. Plus the collector mufflers leak badly around the collector joints, especially of you have any pipe down stream causing back pressure.

The only way I was able to quiet down my 572 was with a full exhaust system (3" x-pipe dynomax system exiting directly behind the rear wheels). I even tried 4" flowthrough mufflers after the collector with 4" turn-downs, but it rattled my teeth and alerted every cop in three counties.