Precision Fit for Your Cummins:
This spacer is meticulously designed to match the exact specifications of a range of Cummins engines, including PB 4B3.9, 4B3.9, B5.9, 6B5.9, B4.5, ISB 6.7, and B129B. It serves as a direct, bolt-on replacement for OEM numbers 5266557, 3969987, 4762012AB, 5086720AC, and 05086720AC, guaranteeing a perfect fit every time.
Installation Note:
For optimal performance, please ensure the mating surfaces are clean and free of old gasket material before installation.