Rear Axle hub reduction vent kit. If you are running at high speeds,
you really should look at this upgrade. The cost of the kit is WAY less
than the cost of the gear/bearings when they fail.....and they fail
quite often based upon the numbers we are selling.
If your truck
is running at Extended High Speed Cruising, you need to investigate
these. German manufacture, complete kit. 1 kit per axle.