pipes & jetting questions

[sprtrx300ex]

I have a 300ex with a k&N filter on it. I was going to get a FMF Mega Max 2 system put on it. One of the other threads said that FMFs don't give out a lot of power. Is this true? Also, if I get a white bros instead, will I need to put in a stage one or two jet, and do they give out a lot of power? I can't run my bike with no airbox lid because of dusty conditions.

[BIGRED400]

I just put in a K&N airfilter with an outerwear open airbox with stage 2 jets from a K&N jetkit with a DJ 165 and also a White Brothers E-Series pipe and the power is unreal compared to stock ...I live in Fla.


2002 400 EX
2002 250 EX
:D