lower cost alternative
I listened to sound bites and compared flow stats and went with Hooker mufflers instead of Borlas. The sound and flow are similar. I'm running ported stock headers w/high flow cats, x-pipe, and 2.5" true duals, no resonator. The cruise and normal take-off are not much louder than stock exhaust at wot. At wot now, it clearly buzzes. An h-pipe instead of an x-pipe will cut the buzz for burble but keeps the torque band low, if that's what you want.