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  1. #1
    Chine Walker
    Join Date
    Nov 2006

    Can someoene measure the exhaust outlet on their GPR??

    I need the diameter of the cutout in the hull.

    Thank you,

  2. #2

    Join Date
    Dec 2005
    the hull opening is 83 mm

  3. #3
    I always wanted an adjustable block off plate on the outlet. Think of how easy you could fine tune the back pressure for top end rpm's .

  4. #4
    83mm D plates!!

  5. #5
    Ramps's Avatar
    Join Date
    Jan 2008
    Myakka, FL

    Thumbs up Awesome!!

    This sounds like a great idea..Has anyone thought of this before??? What results could we see????

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