PowerCore 4 or White Bros. or Yoshi slip on?
#12
Pro Circuit didn't need to do their homework, White Bros. did it for them. The Pro Circuit head pipe w/R4 slip on produced more HP than the pro meg head pipe. I do like the R4 even though I have the complete Pro Circuit but I know people who have trouble with the E series.
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Jeff Roper
Polaris Ask an Expert! In fond memory of Old Polaris Tech.
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Feb 1, 2022 11:48 AM
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