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USD 34.84
Part #: BT40400-105

Bully Dog 40400-105 Universal OBDII Block

For use with Bully Dog GT, WatchDog. Also fits H&S Mini Maxx & Black Maxx
Part #: BT40400-105
$ $34.84
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The Bully Dog 40400-105 Universal OBDII Block fits the Bully Dog WatchDog and GT Tuner. It can also be used with the H&S Performance Mini Maxx and Black Maxx Tuners.


  • MFG. Number 40400-105
  • Manufacturer Name Bully Dog Technologies
  • Shipping Weight 1.00 lb.
  • Shipping Length 2 in.
  • Shipping Width 5 in.
  • Shipping Height 7 in.
  • UPC 681018404983
  • Prop 65 WARNING: Cancer & Reproductive Harm -


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Most Popular Questions

what does this blocker do? what does this product do exactly?
View Staff Answer 
The Bully Dog 40400-105 Universal OBDII Block is specially designed for the Watch Dog and Gt Tuner. It supplies power to the unit. You'd only have a use for this if you need to replace the power cable on your WatchDog , GT Tuner, Mini Maxx or Blackmaxx Tuner that has a malfunctioning OBDII block.