Anyone have any suggestions for a good low end power boosting exhaust for a 05 TRX 400 EX. Been told White Bros. E series is good. Is rejetting required or suggested?
from what ive heard from recent topics like this just about every pipe in the world! it pisses me off that there are so many to choose from. good luck with ur decision. i still hevent chosen a pipe yet. anyway i would get yoshi w/b or hmf.
HMF will give you great power all around.