On my last high speed get off of my 07 WR 450, one of the damaged items was my silencer. The tubing is kinked enough that it is beyond saving. Being broke, and needing to get back on my bike, I found a 06 YZ 450 silencer for pretty cheap. I know it won't have a spark arrestor (dont worry, I'll fix it), but will it bolt up to my bike? I didn't know if the aluminum frames were a copy from the YZ's or not. It obviously doesn't have the same part number, but anyone know if it will work, or do I keep shopping?