Engineer Owned and Operated
  • Speedometer Adapter


    Speedometer Adapter

    Also known as the VSSB (Vehicle Speed Sensor Buffer) or DRAC (Digital Ratio Adapter Computer), this module matches your speedometer to changes in differential ratio and/or tire size.

    Currently in-stock for 2.56 and 2.73 differentials with 40" or 42" tires.

    Custom combinations available, contact us for details.

    Plug-in replacement for OEM adapter.  Fits 1994 - 2003 Hummer / H1.