anyone running yoshimura comp series slip on

does anybody have a yosh comp series slip on for their yz 450 if so how do you like it did you notice a power icrease. i cant decide which slip on to get between the yosh or the dr d i would really like somemore top end power. if there are any comments i would appreciate them. thanks

I've got one on my 426. It seemed to have a little better throttle response, but that's about it. I wasn't very impressed.:cry:

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