View 8 Photos View 0 Videos 2004 Cummins ISX 450ST Camshaft for a Peterbilt 378 Newly Listed $699.95 USD Genuine Cummins ISX Injector Camshaft, Measurements: 43" Long and 3.25" Diameter, Take off Cummins ISX450ST Engine with 535,578 miles, Engine Serial: 14044779, Build Date: 11-23-2002,... ConditionUsedFits To Make(s)PETERBILTFits To Model(s)378Stock Number16306 MLS Number14104392CategoryCamshafts Last Updated1/22/2026 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 8 Photos View 0 Videos 2004 Cummins ISX 450ST Camshaft for a Peterbilt 378 Newly Listed $649.95 USD Genuine Cummins ISX Valve Camshaft, Measurements: 43" Long and 2.5" Diameter, Take off Cummins ISX450ST Engine with 535,578 miles, Engine Serial: 14044779, Build Date: 11-23-2002,... ConditionUsedFits To Make(s)PETERBILTFits To Model(s)378Stock Number16305 MLS Number14104391CategoryCamshafts Last Updated1/22/2026 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 9 Photos View 0 Videos 2004 Cummins ISX 450ST Rocker Arm for a Peterbilt 378 Newly Listed $224.95 USD Cummins Rocker Arm Assembly , Take off Cummins ISX450ST Engine with 535,578 miles, Engine Serial: 14044779, Build Date: 11-23-2002, Casting #'s: 4059304 / 4059294 / 4059351 / 026241 ConditionUsedFits To Make(s)PETERBILTFits To Model(s)378Stock Number16301 MLS Number14104387CategoryRocker Arms Last Updated1/22/2026 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 10 Photos View 0 Videos 2004 Cummins ISX 450ST Rocker Arm for a Peterbilt 378 Newly Listed $224.95 USD Cummins Rocker Arm Assembly , Take off Cummins ISX450ST Engine with 535,578 miles, Engine Serial: 14044779, Build Date: 11-23-2002, Casting # 4059353 / 4059297 / 026241 / 4059306 ConditionUsedFits To Make(s)PETERBILTFits To Model(s)378Stock Number16300 MLS Number14104386CategoryRocker Arms Last Updated1/22/2026 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 7 Photos View 0 Videos 2004 Cummins ISX 450ST Rocker Arm for a Peterbilt 378 Newly Listed $499.95 USD Cummins Rocker Arm Assembly , Take off Cummins ISX450ST Engine with 535,578 miles, Engine Serial: 14044779, Build Date: 11-23-2002, Casting # 3680167, *comes as a set, with both rocker... ConditionUsedFits To Make(s)PETERBILTFits To Model(s)378Stock Number16292 MLS Number14102210CategoryRocker Arms Last Updated1/22/2026 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 6 Photos View 0 Videos 2004 Cummins ISX 450ST Engine Oil Pump for a Peterbilt 378 Newly Listed $59.95 USD Cummins ISX Oil Pump, Take off 2004 Peterbilt 378 with a Cummins ISX450ST Engine with 535,578 miles, P/N: 237320C ConditionUsedFits To Make(s)PETERBILTFits To Model(s)378Stock Number16266 MLS Number14094734CategoryEngine Oil Pumps Last Updated1/16/2026 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 5 Photos View 0 Videos 2004 Cummins ISX 450ST Valve Cover for a Peterbilt 378 Newly Listed $69.95 USD Cummins ISX Valve Cover, P/N: 4059375 ConditionUsedFits To Make(s)PETERBILTFits To Model(s)378Stock Number16257 MLS Number14094716CategoryValve Covers Last Updated1/16/2026 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 9 Photos View 0 Videos 2004 Cummins ISX 450ST Engine Block / Cylinder Block for a Peterbilt 378 Newly Listed $3,195 USD Cummins ISX Cylinder / Engine Short Block with Crankshaft, Pistons and Rods, Take off 2004 Peterbilt 378 with a Cummins ISX450ST Engine with 535,578 miles , Only Guaranteed as a... ConditionUsedFits To Make(s)PETERBILTFits To Model(s)378Stock Number16256 MLS Number14094713CategoryEngine Blocks / Cylinder Blocks Last Updated1/16/2026 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 11 Photos View 0 Videos 2004 Cummins ISX 450ST Engine Thermostat Housing for a Peterbilt 378 $89.95 USD Genuine Cummins ISX Thermostat Housing, Casting # 3683130 ConditionUsedFits To Make(s)PETERBILTFits To Model(s)378Stock Number16029 MLS Number14021903CategoryEngine Thermostat Housings Last Updated1/6/2026 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info
View 9 Photos View 0 Videos 2004 Cummins ISX 450ST Engine Thermostat Housing for a Peterbilt 378 $74.95 USD Genuine Cummins Thermostat Housing Cover, Material: Steel, Casting# 3682667 ConditionUsedFits To Make(s)PETERBILTFits To Model(s)378Stock Number16024 MLS Number14021898CategoryEngine Thermostat Housings Last Updated1/6/2026 LocationSpokane Valley, WA, US Sold ByHigh Mountain Horsepower (833) 913-___ SHOWNUMBERCall Seller Email Seller Save More Info