Our replacement Voltage Regulator plug kit is very popular especially with the "D" series Tractors when upgrading the electrical system. This kit is for the 4 terminal Delco Remy Voltage Reguators. Get rid of the corrosion on that VR and upgrade to a B&B VR kit!  Also available as an option in pigtail form. Just tell us what color wires are needed, the length and gauge and we can make a replaceable pigtail. Pricing is determined on length and size of the wires used.