400ex slip-on of full?

[BigBearkid4x4]

Hey guys im lookin at getting a hmf for my 2002 400ex. the header is 200 more than just the slip-on and my problem is i dont know what to get. alot of people tell me that the stock 400ex header works awsome on the stock motor but i didnt know if they were wrong and the header does add power over the stock one and is it worth the 200 bucks. do you guys at hmf have dynos of either or the h.p. #'s of them? thansk again

[motoz/HMF]

Hey guys im lookin at getting a hmf for my 2002 400ex. the header is 200 more than just the slip-on and my problem is i dont know what to get. alot of people tell me that the stock 400ex header works awsome on the stock motor but i didnt know if they were wrong and the header does add power over the stock one and is it worth the 200 bucks. do you guys at hmf have dynos of either or the h.p. #'s of them? thansk again


Here you go:
http://www.hmfengineering.com/forums/showthread.php?t=57