does anyone one have a white brothers header pipe for a 400ex cuz all i got is the slip on e series or do u know of any places where i can order it

 

You can order one at Denniskirk.com or rockymountainatv.com

 

the white brothers headers will NOT fit their slip ons. the slip ons and full system silencers are different. if you already have a slip on you have a few choices:

1. take out the stock header and grind the welds in the beginning to increase flow
2. by a fmf powerbomb or a pro circuit header