Q: what would give the best sound and the most power the flowmaster american thunder cat back duels or maganflow cat back duels? there about a 100 dollars different. the magnaflow muffler style is turbo and the flowmaster is chamber? whats really the difference.
A: None of them will give you more than about 3-4 horsepower. So selecting one for power, is basically worthless. Other than that, just pick which you think sounds best, and go with that one.