Wholesale Cummins Thermostat 5256423 4929642 for 5.9L B5.9 B3.9 ISB QSB Diesel Engine

Q1: What are the part numbers for this thermostat?
A1: 5256423 and 4929642, these two numbers are interchangeable.

Q2: Which engines does it fit?
A2: Suitable for Cummins 5.9L, B5.9, B3.9, ISB, QSB diesel engines.

Q3: Is this original or aftermarket?
A3: We can supply genuine and high-quality aftermarket options for your choice.

Q4: Does it come with gasket?
A4: Normally thermostat only. Gasket is separate if required.

Q5: What’s your MOQ?
A5: Small order acceptable, wholesale price for bulk quantity.