One of the best products I've purchased and a must have for the '09 CRF450. The '09 CRF450 falls on its face at about 8200RPM, but this pipe adds about 3+hp on the dyno and brings peak power to about 9500RPM which is a massive improvement.
I didn't realize at first, but I thought the included 94db insert was missing when I unpacked everything. Turns out it is pre-installed and you can see it in the product photo. The pics I added are the pipe without the insert (99db)(almost 1hp gain) and the free exhaust plug and spring puller that come with the kit.
Don't bother with the full carbon kit. It only saves 0.2lbs over this full titanium and carbon will breakdown as the packing wears out. This drops over 2.0lbs from the stock unit. Oh and Titanium is the easiest to maintain(clean) material there is. The stainless calls for occassional polish every few hours of use etc..
So far I love this new setup and it looks totally trick!