ok im want one of the three pipes tell me which u think would be the best for my 400ex[img]i/expressions/face-icon-small-confused.gif[/img]

 

I have a Pro Circuit T4 s/o and have no complaints. It sounds good and well made. I've heard HMF is the one to get. I think anyone of these is a good choice.

 

I run the White Bro's R4 on my EX. Great pipe except for the fact that when it comes time to repack it. In order to repack it you have to drill out the rivets and then intall new ones. What a pain that is. I would pick one that has screws / bolts that hold the inner screen and packing in place.