This cold-weather upgrade is for trucks used in extreme weather (i.e. snow plows). They might be a little harder to install than the 2/0 kit. Some customers, but not all, have reported that minor fitting was necessary (ie grind starter lug for clearance).
Left Positive upgraded 3/0 battery to starter for improved Cold Weather/Hard Start performance.
One (1) Positive (+) military-style battery terminal with a lock nut.
Please see the picture.
Loom and cover are optional and available for purchase below.