HPD, HotSeat, FTR, RCR Pipes
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Quadfather....I think what you meant to say was the asthetic apperance of the HPD pipe cannot be matched by some of the other pipe builders. For overall performance the RCR pipe and HPD pipe are nearly identical. My results with identically modified bikes shows the RCR Midrange pipe slightly outpulls an HPD trail pipe. My guess is the slight difference between the two had more to do with the tolerances at Polaris than the pipes themselves.