race car mufflers

If you like the flowmaster sound, but they are too loud, look at the delta flow 40s, they are the quietest of the two chamber. Or you could go to the fifty series, three chamber.
I also like the hooker aero flows that i have, used them on a nine second car thru the mufflers, and they were less than half the price of the 50series flowmaster i have.
If you want low restriction, and quiet, i would look at dynomax or magnaflow straight thru, but get some long ones , the longer the quieter. The magna flows on my big block car have a 22"case.