Had the pleasure of driving a Roxor with a Diesel Freaks staege 2 tune, new intake kit from Diesel Freaks, and a new cat replace 2.5" dual race exhaust from Diesel Freaks. If our on the fence about the results, let me tell you you wont be dissapointed. I dont think i could ever drive a Roxor without these mods. Totally different rig. So much more fun and useable. The exhaust is so awesome sounding. Dont worry about if being to loud. You can still talk in the cab to the person next to you. If your looking for in my opinion the first thing you should do, get the tune and the intake and the exhaust from Wade at Diesel Freaks. YOU WONT BE SORRY!!