Moi, borla is ok for sound nice for style bad for flow. I just custom fab'd mine. My Avatar has a small pic + some in my grage pics. I absolutly love the rumble i have now, i have driven+heard a borla kit its kinda twangy and fluffly throttle response sound though i dont know what else he had for exhuast. But my side pipe just have a cylindrical small resonator + x pipe and it sounds great(especially when cold at idle LOL) but full throttle sounds very unique and strong