had a 07 m1000, full slp pipe, that ran as good as any m1000 I've came across and better, My stock 09 would hand it to the 07 everywhere except the tail end of a drag race. the track just keeps going( its almost stupid how you can keep pulling a hill at .2mph) You can nearly come to a complete stop while climbing and pull it over into a side hill and start gaining speed again. You need the 09 tunnel to get all the goodie out of the track.
Oh, and do a search, I think someone asked the same question a couple weeks ago word for word, and about every two weeks since it came out.