I will 100% agree on the 190/30 on the street with the kc stage 2. I installed mine about 6 months ago and it has awesome street manners, it whistles like a redneck talking through his tooth, so if you dont like that a muffker would be highly advised. The setup tows my 38 foot fifth wheel fairly well too. It starts to creep in temps when im not paying attention and get under the turbo, but a quick tow/haul button press kicks it up to 2000-2100 rpm and drops temps back down to 1000-1100 degrees.