I recently picked up an 03 WR450. Plated, supermoto, etc. It currently has what appears to be a PowerBomb header connected to what appears to be a stock can. When I look in the end with a flashlight I see mesh, so I think the spark arrestor is intact. However, it's quite loud. Sometimes I enjoy loud, but sometimes stealth is nice as well. Is the stock can repackable? If so, is it reasonably quiet with fresh packing? Is there anything that may have been removed that would make it loud? If not, any suggestions for something reasonably priced?