any suggestions on which pipe?

[breadman400ex]

I am trying to make up my mind what pipe I want to go with on my 2001 400ex. I am trying to decide between the Pro Circuit T-4, White Bros. E series, or the White Bros. R series. My quad is all stock except for a Uni filter. Which is the best and will I need to rejet with any of the three? Any suggestions would be greatly appreciated.

[300exTJjeeper]

Hi there fellow rider,

you will need to rejet no matter what you get to gain the right performance and prevent engine failure.

All 3 are good pipes, I just order a T4. It depends what you want out of the pipes.
I got the T4 for the low to mid range power and becuase all of the good comments I have recieved for it during the past week. the drawback it's the loudest one out of your pipes you want.

As for the rest I can comment on them because I have not researched them but I'm sure other riders have.,

Just my opinion

[spurgin]

The T-4 and the White Brothers R is about the same thing. The R is a little more $ but its polished or so ive been told.