Drop deck. UMP

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  • JCSullivan00
    Senior Member
    • May 2007
    • 1418

    #1

    Drop deck. UMP

    Does anyone know how much you can legally drop the deck per UMP rules. I can't seem to find it anywhere.
  • twisterf5
    Senior Member
    • May 2012
    • 334

    #2
    G.) The maximum slope/rake of the interior sheet metal “shelf” front-to-rear is 4”-inches when measured
    from the firewall to the base of the spoiler. A maximum of 2”-inches of slope/rake will be permitted in front of
    the rear of the seat to the firewall and a maximum of 2”-inches of slope/rake will be permitted from the rear
    of the seat to the base of the spoiler

    hope this helps but i never have seen it checked

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    • Renegade Cust Susp
      Senior Member
      • Dec 2008
      • 349

      #3
      2in max is what we have been told been running drop deck for 4yrs. Hood can't contour with deck has to be straight across if its as wide as the car the back of it must be filled in
      Broc Burton
      go.fast.crs@gmail.com

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      • JCSullivan00
        Senior Member
        • May 2007
        • 1418

        #4
        Sounds good. Thanks for the replies.

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