i ran a HVH super sucker on my 511ci..got my 565ci back last week from Par racing..i asked the owner Scott Duggins what he thought of the spacer and he Gave thumbs up !..as a matter of fact they make them at PAR..BUT SINCE I HAD THE hvh I AM GONNA TRY IT.
THE hvh really helped my 511ci. you could feel the responce in the pedal
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Bjuice..
"I'M YOUR HUCKLEBERRY ! "