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2004 Peterbilt 378 Parts
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![Heavy Duty Truck V-Belt for Select 1981-2004 Hino, Peterbilt and Other Makes [RA Section, 55.910 in. Outside Circumference]](https://www.jegs.com/images/mini_100/400/465/465-tr22553.jpg)
GATES
Heavy Duty Truck V-Belt for Select 1981-2004 Hino, Peterbilt and Other Makes [RA Section, 55.910 in. Outside Circumference]
Part Number: 465-TR22553
$6743
Ships on Nov 02, 2026
Lowest price guarantee![Heavy Duty Truck V-Belt for Select 1981-2004 Hino, Peterbilt and Other Makes [RA Section, 55.910 in. Outside Circumference]](https://www.jegs.com/images/mini_200/400/465/465-tr22553.jpg)
GATES
Heavy Duty Truck V-Belt for Select 1981-2004 Hino, Peterbilt and Other Makes [RA Section, 55.910 in. Outside Circumference]
Part Number: 465-TR22553
Ships on Nov 02, 2026Lowest Price Guarantee$6743
![Micro-V Serpentine Belt for Select 1993-2008 International and Other Makes [8-Rib, 73.517 in. Outside Circumference]](https://www.jegs.com/images/mini_100/400/465/465-k080730.jpg)
GATES
Micro-V Serpentine Belt for Select 1993-2008 International and Other Makes [8-Rib, 73.517 in. Outside Circumference]
Part Number: 465-K080730
$10640
Ships on Nov 02, 2026Lowest price guarantee![Micro-V Serpentine Belt for Select 1993-2008 International and Other Makes [8-Rib, 73.517 in. Outside Circumference]](https://www.jegs.com/images/mini_200/400/465/465-k080730.jpg)
GATES
Micro-V Serpentine Belt for Select 1993-2008 International and Other Makes [8-Rib, 73.517 in. Outside Circumference]
Part Number: 465-K080730
Ships on Nov 02, 2026Lowest Price Guarantee$10640
![Green Stripe DriveAlign Heavy Duty Belt Tensioner Fits Select International, Kenworth and Other Makes [76.3 mm Pulley O.D.]](https://www.jegs.com/images/mini_100/400/465/465-38587.jpg)
GATES
Green Stripe DriveAlign Heavy Duty Belt Tensioner Fits Select International, Kenworth and Other Makes [76.3 mm Pulley O.D.]
Part Number: 465-38587
$28315
Ships on Nov 02, 2026Lowest price guarantee![Green Stripe DriveAlign Heavy Duty Belt Tensioner Fits Select International, Kenworth and Other Makes [76.3 mm Pulley O.D.]](https://www.jegs.com/images/mini_200/400/465/465-38587.jpg)
GATES
Green Stripe DriveAlign Heavy Duty Belt Tensioner Fits Select International, Kenworth and Other Makes [76.3 mm Pulley O.D.]
Part Number: 465-38587
Ships on Nov 02, 2026Lowest Price Guarantee$28315
![DriveAlign Idler Pulley Fits Select Peterbilt, International and Other Makes [83.5 mm Pulley O.D., 6-Groove, Flanged]](https://www.jegs.com/images/mini_100/400/465/465-36223.jpg)
GATES
DriveAlign Idler Pulley Fits Select Peterbilt, International and Other Makes [83.5 mm Pulley O.D., 6-Groove, Flanged]
Part Number: 465-36223
$10382
Ships on Nov 02, 2026Lowest price guarantee![DriveAlign Idler Pulley Fits Select Peterbilt, International and Other Makes [83.5 mm Pulley O.D., 6-Groove, Flanged]](https://www.jegs.com/images/mini_200/400/465/465-36223.jpg)
GATES
DriveAlign Idler Pulley Fits Select Peterbilt, International and Other Makes [83.5 mm Pulley O.D., 6-Groove, Flanged]
Part Number: 465-36223
Ships on Nov 02, 2026Lowest Price Guarantee$10382
GATES
Heavy-Duty Thermostat for Select 1965-2017 International, Ford and Other Makes
Part Number: 465-33579
$11864
Ships on Nov 02, 2026Lowest price guarantee
GATES
Heavy-Duty Thermostat for Select 1965-2017 International, Ford and Other Makes
Part Number: 465-33579
Ships on Nov 02, 2026Lowest Price Guarantee$11864
GATES
FleetRunner Heavy Duty V Belt for Select 1960-1987 Chevrolet, Dodge, Ford, Isuzu, Nissan
Part Number: 465-9590HD
$2866
Ships on Nov 02, 2026Lowest price guarantee
GATES
FleetRunner Heavy Duty V Belt for Select 1960-1987 Chevrolet, Dodge, Ford, Isuzu, Nissan
Part Number: 465-9590HD
Ships on Nov 02, 2026Lowest Price Guarantee$2866
GOODYEAR BELTS
1060540 Serpentine Belt, Fits Select Makes/Models, K Profile, 6 Ribs, 54 in. Effective Length
Part Number: 498-1060540
$2081
Ships on 11/03/2026Lowest price guarantee
GOODYEAR BELTS
1060540 Serpentine Belt, Fits Select Makes/Models, K Profile, 6 Ribs, 54 in. Effective Length
Part Number: 498-1060540
Ships on 11/03/2026Lowest Price Guarantee$2081
GOODYEAR BELTS
1120891 Serpentine Belt, 2004-2007 Peterbilt 378, 2005-2007 Peterbilt 379, K Profile, 12 Ribs, 89.1 in. Effective Length
Part Number: 498-1120891
$6756
Ships on 11/05/2026Lowest price guarantee
GOODYEAR BELTS
1120891 Serpentine Belt, 2004-2007 Peterbilt 378, 2005-2007 Peterbilt 379, K Profile, 12 Ribs, 89.1 in. Effective Length
Part Number: 498-1120891
Ships on 11/05/2026Lowest Price Guarantee$6756
GOODYEAR BELTS
1120903 Serpentine Belt, Select Pierce Mfg. Inc.; Peterbilt; International, 12 Ribs, 90.3 in. Effective Length
Part Number: 498-1120903
$5261
Ships on 11/03/2026Lowest price guarantee
GOODYEAR BELTS
1120903 Serpentine Belt, Select Pierce Mfg. Inc.; Peterbilt; International, 12 Ribs, 90.3 in. Effective Length
Part Number: 498-1120903
Ships on 11/03/2026Lowest Price Guarantee$5261
GOODYEAR BELTS
3287 Serpentine Belt Drive Component Kit Select Volvo; Freightliner; Kenworth; Peterbilt; International
Part Number: 498-3287
$24054
Ships on 11/03/2026Lowest price guarantee
GOODYEAR BELTS
3287 Serpentine Belt Drive Component Kit Select Volvo; Freightliner; Kenworth; Peterbilt; International
Part Number: 498-3287
Ships on 11/03/2026Lowest Price Guarantee$24054
GOODYEAR BELTS
3254 Serpentine Belt Drive Component Kit Select Peterbilt; International
Part Number: 498-3254
$23105
Ships on 11/05/2026Lowest price guarantee
GOODYEAR BELTS
3254 Serpentine Belt Drive Component Kit Select Peterbilt; International
Part Number: 498-3254
Ships on 11/05/2026Lowest Price Guarantee$23105
FAIRCHILD AUTOMOTIVE
MCH1575 Straight Radiator Hose H.D. Single I.D. Hose, Replaces Dayco 77250GL
Part Number: 443-MCH1575
$3399
Ships on 11/03/2026Lowest price guarantee
FAIRCHILD AUTOMOTIVE
MCH1575 Straight Radiator Hose H.D. Single I.D. Hose, Replaces Dayco 77250GL
Part Number: 443-MCH1575
Ships on 11/03/2026Lowest Price Guarantee$3399
GOODYEAR BELTS
1115 Coolant Straight Hose,2.5in. I.D, 36 in. Length Fits Select Make/Models
Part Number: 498-1115
$9786
Ships on 11/05/2026Lowest price guarantee
GOODYEAR BELTS
1115 Coolant Straight Hose,2.5in. I.D, 36 in. Length Fits Select Make/Models
Part Number: 498-1115
Ships on 11/05/2026Lowest Price Guarantee$9786
![FleetRunner Micro-V Serpentine Belt for 2004-2007 Mack and Peterbilt Models [12-Rib, 90.873 in. Outside Circumference]](https://www.jegs.com/images/mini_100/400/465/465-k120903hd.jpg)
GATES
FleetRunner Micro-V Serpentine Belt for 2004-2007 Mack and Peterbilt Models [12-Rib, 90.873 in. Outside Circumference]
Part Number: 465-K120903HD
$16893
Ships on 11/06/2026Lowest price guarantee![FleetRunner Micro-V Serpentine Belt for 2004-2007 Mack and Peterbilt Models [12-Rib, 90.873 in. Outside Circumference]](https://www.jegs.com/images/mini_200/400/465/465-k120903hd.jpg)
GATES
FleetRunner Micro-V Serpentine Belt for 2004-2007 Mack and Peterbilt Models [12-Rib, 90.873 in. Outside Circumference]
Part Number: 465-K120903HD
Ships on 11/06/2026Lowest Price Guarantee$16893
![DriveAlign Idler Pulley for Select 2004-2009 Sterling Truck, Freightliner and Other Makes [74 mm Pulley O.D., Smooth Pulley]](https://www.jegs.com/images/mini_100/400/465/465-36269.jpg)
GATES
DriveAlign Idler Pulley for Select 2004-2009 Sterling Truck, Freightliner and Other Makes [74 mm Pulley O.D., Smooth Pulley]
Part Number: 465-36269
$21273
Ships on 11/06/2026Lowest price guarantee![DriveAlign Idler Pulley for Select 2004-2009 Sterling Truck, Freightliner and Other Makes [74 mm Pulley O.D., Smooth Pulley]](https://www.jegs.com/images/mini_200/400/465/465-36269.jpg)
GATES
DriveAlign Idler Pulley for Select 2004-2009 Sterling Truck, Freightliner and Other Makes [74 mm Pulley O.D., Smooth Pulley]
Part Number: 465-36269
Ships on 11/06/2026Lowest Price Guarantee$21273
