they have a pipe for the 400EX and it would look sick to have those check it out at www.lteracing.com

 

they are nice.

 

I have them, they work great, quiet, good hp gains and excellent torque increase. There are pics of them on my page.

 

how quiet are they just a little bit or a lot i was thinking about getting them for my other quad my raptor

 

The ones I have were even before the quiet cores came out but the sound is deeper, less sharp than others i've heard and from what I understand, they are now even quieter. Use care though with aftermarket plastice, the header on the left side may rub the rear side pannel of the fender (Not a problem with stock plastic) causing the classic 250r melt Maier plastics were known for. Not LTE's fault and an easy fix with a little heat tape.