Big Boss Caterpillar C15 C16 3406 Engine Oil Cooler By PDI 0R9056 0R5511 *Please Verify Your OEM Numbers Before Purchasing Heavy Duty Engine Oil Cooler Fits Caterpillar C15, C16, 3406 Engines (1994-2007) Direct Aftermarket Replacement for OEM #s: 0R9056 0R5511 7C3039 1330125 4N0619 High Quality Cons... See More