$49.99

20 in stock

The 10L80 10L90 transmission cooler barbell bypass kit is a custom “barbell” manufactured by BET Performance to eliminate the cooler thermostat (bypass) found on late model 10L80, 10L90 and some Allison transmissions.

This transmission cooler barbell bypass kit fits:

  • 10L80 / 10L90 2018 and newer

It features:

  • Simple to install, some models can be done on the vehicle
  • Greatly reduces the chance of transmission overheating
  • Full time cooler flow, no matter what the transmission temperature is
  • Allows for instant checking of transmission level after service once minimum required temperature is reached
  • Uses stock thermostat housing so no change to cooler lines
  • Can extend transmission fluid life

The 10L80 10L90 transmission cooler barbell bypass kit includes the cooler plug valve with both o-rings. Installation instructions are available by request.

Need a different transmission cooler barbell bypass kit?

Additional information

Weight 1 lbs
Dimensions 6 × 4 × 4 in