Yeah what javier just said! I ran open downpipe for awhile and the exra power was cool but it got old. I finally threw a mandrel 3" downpipe on there and got my exhasut all fixed and now I love that. It may have lost some power but that is why I got an electronic cutout (not installed yet) anyways its nice and quit and no more breathing fumes
man i rode in George's turbo w/o a downpipe....BWAAAAAAAAAAAAAAAAAAAAAAAHH It sounded exceptionaly good, plus you could actaully hear the turbo spooling way over the sound of the exhuast. What surprized me was that on the highway, when I rode one lane over from him, I couldn't hear the exhuast what-so-ever. I guess its just loud because you're sitting directly behind it.