i know this topic has been discussed many times. i was just wondering how you all modified your stock 400ex exhaust. any help would be appreciated. thanks

 

i can only tell you what ive been told (dirt wheels helped me) that if you dont care about noise, a ct racing pipe with 12 discs will give you a top HP of 27.9 at 102 db and tied with the ct pipe is a white bros. E Series with a top HP of 27.9 at 97 db. hope this helps!
ride on!
UC

 

click Here

 

ya CT pipes are awesome, also look into SPARKS X6, another great PIPE.

 

this is an OLD thread. yeah, i have had an x-6 for a year or so.