View 9 Photos View 0 Videos 2004 Cummins ISX 450ST Cylinder Head for a Peterbilt 378 Newly Listed $1,495 USD ISX Dual Cam Cylinder Head Assembly, Take off 2004 Peterbilt 378 with a Cummins ISX450ST Engine with 535,578 miles, Only Guaranteed as Rebuildable Core, P/N: 5658283 / 3683002 ConditionUsedFits To Make(s)PETERBILTFits To Model(s)378Stock Number16254 MLS Number14094709CategoryCylinder Heads Last Updated1/16/2026 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info