Ok YZers. I'm from the slow WR forum and am looking to lighten up my exhaust system. Anyone who has upgraded their exhaust, I'm interested in buying a stock 04 YZ450F silencer. Yea the plan is to drill out the elbow and add that promoto thingy with the spark arrestor and quiet it down with their quiet insert. Should all be cheaper than one of those Q-exhaust (look better too). Thanks Guys!