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  1. #1
    inteljd's Avatar
    Join Date
    May 2006
    Boise, ID

    Is anyone out there using the RAD4 Exhaust extension?

    I'm considering adding this to my ski but not sure if it's really worth it to go on my RXP. Opinions please?
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  2. #2
    masta2000's Avatar
    Join Date
    Aug 2009
    everything i have heard is 80rpm increase for pretty much everyone

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