i have a 4-1 race header and an mbrp caback. as some of you may know, its reeeally loud. i wasnt satisfied with the sound, and on top of that today i got a 70 dollar exhaust ticket. so im a little fed up. if i were to buy a focus sport stealth resonator, and replace my mbrp resonator with it, would i get the full stealth effect? im tired of rice, i miss my mellow mbrp stock header sound.  thanks alot. also, how much of a difference would a high flow cat welded in make? as much as the stealth?