I've been checking out the forums on Thumper Talk for some time and have finally registered so I can start talking with you all. I'm first on the list for the SE 450f and I'm hoping I'll recieve the call tomorrow telling me it's in. In the meantime I want to order a spark arrestor, so it's here when the bike arrives, and was wondering what folks are putting on their bikes. In the past I've been running FMF and would recieve jetting information from them which has worked out well. I've been running the Q pipe since the rangers have their eyes on the "noisy" blue bikes (maybe they'll be fooled by the yellow this year). This muffler has done well for me on my 02 250f and was thinking of buying the Q2 for my new 450. My reservation is paying the $400 dollars for one when I can buy the pro billet end cap to mount on the stock muffler for $150. I have no idea how these end caps work and don't want to drill and rivet one on if it's worthless, or performes less than desired? Any suggestions? I'm also not stuck on the FMF it has just worked well for me in the past. I'm also not against paying $400 if it's worth it, but if a $150 end cap works as well why not? Any suggestion would be greatly appreciated.