The Paccar K37-1012 is a primary, 30-micron fuel filter designed for heavy-duty truck engines, including the Paccar MX-11 and MX-13. It is often used in Peterbilt and Kenworth tractors from model year 2016 Engine and vehicle compatibility The K37-1012 filter is compatible with the following Paccar: MX-11 and MX-13 engines, model years 2016 Cumm/ns: X12 and X15 engines Kenworth/and Peterb/lt trucks Specifications The specifications for the Pacc K37-1012, based on Micron rating: 30 micron at 99% efficiency Style: Cartridge Includes: O-ring Largest outside diameter: 4.16 in. Largest inside diameter (end): 0.82 in. Overall length: 7.62 in. Engine compatibility: Pacc MX-11 and MX-13 engines CROSS REF PF46082 P581298 FS20173 L5112F