Maxiforce Head Gasket QSC 8.3 for Cummins 3943366 520-15521 They are designed for continuous

They are designed for continuous heavy-duty use and meet the requirements of large farms and contractors

Fits Massey Ferguson Combine: 8680 - Replaces OEM Number 71367651

also industrial versions above tractors

750C - Replaces OEM Number RE52508

Autolite 437

Maxiforce Head Gasket QSC 8.3 for Cummins 3943366 520-15521 They are designed for continuousAftermarket Head Gasket for the Cummins C QSC 8. 3 diesel engine. Direct replacement for Cummins 3943366. Please verify fitment against your equipment's serial and engine casting numbers before ordering. Cross references are provided as a guide; the customer is responsible for confirming compatibility.