OE Replacements: 181843, CUP181843, 3972071, 3283589, 3902465, 3906700, 3910706, 3917324, 5292738, 3972071

Details: Thermostat Part of Thermostat Kit CUP181844 1.140in Valve Diameter 2.13in Overall Diameter Cummins 4B/6B Application

Cummins 4B/6B Application

Direct replacement for OE part 3972071

Durable construction providing superior reliability

Quality You Can Trust – PAI has established themselves as the leading supplier of aftermarket heavy duty diesel parts, with quality standards that always meet or exceed OE standards

DETAIL – HDKits thermostats are manufactured with an incredible amount of attention to detail and accuracy. Our thermostats are precision designed to meet or exceed the OEM specifications. After production, the thermostats are tested to ensuring exact fitment and unparalleled product quality.