so i ordered a 4" Flo pro turbo back kit and received MBRP I was just curious if any one had input on MBRP if its louder or has bad drone. I use my truck for long distance hauling and don't want bad drone. I had a 2006 5.9 straight piped... so loud. don't want to go back there LOL... anyway just trying to figure out if I should send it back or not. I considered flo pro + resonator the mechanic said the flo pro sounds good and not bad drone. and could save my money on the resonator.