help

[TRX 400Ex06]

im putting a pipe on my 400ex, i was wondering what would be best? i am liking the hmf bill balance any suggestions? thanks

[Choppers]

look at the yoshimura rs-3 at www.rockymountainatv.com

[Jakeyracer]

OLD THREAD BUT HOPE YOU GET UR ANSWERS LOL

[krt400ex]

yoshimura for sure. they give u great all around power with a good boost offf the bottom. the hmf r mostly focused on the mid and top