View 12 Photos View 0 Videos 2001 Cummins ISB Cylinder Head for a Freightliner MT55 Chassis $600 USD ISB 5.9L 24 Valve Cylinder Head, Visually Inspected and Magged. No Cracks Between Valves. Part # 3943627, Cast # 2-453943627-03. ConditionUsedFits To Make(s)FREIGHTLINERFits To Model(s)MT55 ChassisStock NumberUPS-659151-21 MLS Number13890217CategoryCylinder Heads Last Updated4/17/2026 LocationFresno, CA, US Sold ByGarabedian Equipment (855) 794-___ SHOWNUMBERCall Seller Email Seller Save More Info