mufflers

well i have a 70 duster 340 with 2 chamber flowmasters on it and i love the way it sounds , but i got them for nothing new so i really like them but i was going to buy the dynomax ultra flows if i didnt get the flowmasters. i have had the dynomax on a truck of mine and it made the 6cyl sound real good. but thrush and dynomax are owned by a company called walker. thrush is the lower level performace stuff and dynomax is the high end stuff.