Piston +.030in Size 3.64in Land Diameter 0.685in Bore Diameter Aluminum Cummins SS296/13.2 CFM Application Part number: 220009 OE MFG: CUMMINS OEM Reference: 3045673 Cross Reference: CUMMINS : 165433, 3045673, BM77413, MCB3801743 | INTERSTATE-MCBEE : M-3045673, M-BM77413, MCB3801743 Product Class: Air Compressors & Parts The PAI 220009 is an aluminum piston specified with a +.030 in size, 3.64 in land diameter, and 0.685 in bore diameter for the Cummins SS296/13.2 CFM application. In heavy duty diesel truck parts, a compressor piston travels within a cylinder to compress air for the vehicle's pneumatic system. These dimensions and aluminum construction describe key characteristics of this piston. Cummins OEM reference 3045673, along with cross-references 165433 and BM77413, provides additional part-number context.