Spin-on filters are the standard configuration for lube, fuel, coolant, and hydraulic filtration on most heavy-duty Peterbilt diesel engines. Their self-contained design — filter media, housing, and sealing gasket in a single canister — makes service fast and clean compared to cartridge-style filters. This collection covers spin-on filter options across the common filtration positions on PACCAR MX and Cummins-powered Peterbilts, including lube, fuel primary and secondary, and coolant filter positions.