I just picked up a brand new 07 WR450 from Adventure Motorsports in Twin Falls, ID. They claimed they have the best setup including a custom in house modified LEak jet. I picked up the bike last friday and broke it in on Sat. The bike ripped and had more bottom end than my friends identical WR with teh White Brothers pipe, jet and AIS removal kit. HIs had a little more top end but mine hadn't even been pushed yet while brake in. I will be picking up the FMF power core Ti that was ordered during initial purchase this week. After riding the bike stock(uncorked) I am sure that a pipe isn't necessary but it is coming none the less. I will let you all know what I think after next weekend. A properly setup bike absolutely rips from the dealer and shows the difference from a dealer that knows and one who just sells!