Does anyone know of an after market head pipe that will fit a White Bros. R4 muffler?
Any help is appreciated...







03 400EX
440 kit
stage 1 cam
11.5 to 1 Ross

 

on a 400ex you have 3 options:

1. buy a fmf powerbomb header
2. buy a pro circuit header
3. take the stock header off and grind the weld beads down in the header. the welds are at the beginning of the header where it clamps into the head.

 

Thanks for the info.
Will there be a problem with sealing them together? Also, which header would give the best performance gain?





03' 400EX
bored to 440 and sleeved
stage 1 Web Cam
11:5 to 1 Ross RACING PISTON

 

i have never heard of anyone using the procircuit. i did call procircuit and they did confirm their header will fit slip on silencers. most people who have the powerbomb love it.

 

what about a white bros head pipe

thats what i use

 

the white brothers header (pro meg) will NOT fit slip on silencers. it will only fit their silencer made for that header. i think the s-bend header may fit slip ons but i am not sure so i didn't mention that one. the pro meg does produce more power than the s-bend though