HMF or Yoshimura

[2001300exguy]

ive heard hmf is a really good pipe but is yoshimura better
i want to get a better hp gain and good sound

[LaSalleKid]

I would say go for the HMF. I have heard both at the drag races on 400ex/Raptors.. and the HMF sounds better, and from what I have heard they produce more power as well. I think Yoshi looks awesome tho, either way youll be happy. My advice, get a sparks.

[kruzofman]

how come not the white bros. E-series it gave me some tremendous power gains.. looks totally sick.. and has they nicest sound to it. ( in my opinion ) and you can adjust it with the disc sistem...but get what ever you like best..good luck

[LaSalleKid]

I agree with all of that except for the HUGE power gains you stated. WB doesnt give that good of power gains, I know they dont for a yfz, maybe for yours. Still simply cant compete with a Sparks. No matter what model.

[roostin_dale]

White Bros. is fallin behind, they just cant cut it with the race exhaust's. Out of the two you listed, Yoshi is better....but the two best on the market are sparks and TC....