Keenso 6L80 Thermostat Bypass Kit – Transmission Cooler Barbell Plug For 6L80, 6L90 & 8L90, Replaces 86774933

If you've got a GM vehicle with the 6L80, 6L90, or 8L90 transmission, this Keenso thermostat bypass kit is a great little upgrade.
It replaces the factory thermal bypass valve (part number 86774933) and helps your transmission run cooler, especially during cold starts or when you're towing heavy loads.

It's made from high-strength aluminum alloy, so it's tough, heat-resistant, and won't warp or deform over time.

The bypass design gets coolant circulating faster, which means your transmission fluid warms up quicker and stays at a safer temperature under hard use.

That's a big deal for towing, off-roading, or just making your transmission last longer.

Install is plug-and-play – no modifications required.

Just pull the old thermostat and pop this one in.

Great for DIYers or pros.

Simple part, big improvement in cooling response.