Is anyone running a white brothers R-4 slip-on on a raptor?
May 21, 2002 | 01:49 PM
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Range Rover
Joined: May 2002
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was wondering how the R-4 slip-on performs with airfilter and jetting. does it give you alot of low end to mid range?i would like a complete system but for the money of a complete system i can get my proflow foam filter and dyno jet kit.please give me your feedback.
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