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Our offices are closed for Thanksgiving. Orders placed online will be processed on Monday 12/1/2025.

Our offices are closed for Thanksgiving. Orders placed online will be processed on Monday 12/1/2025.

Parts for Cummins ISB and QSB Engines

Cummins ISB and QSB Parts

We carry a wide selection of parts including alternators, starters, hoses, and fans for Cummins ISB and QSB diesel engines.

If you need any help finding a part, please use our quote request form or call us at 888.687.0539: our knowledgeable inside sales staff will promptly assist you.


MALE ADAPTER ELBOW - ISB / KTA19 / QSK19

Genuine Cummins Part

$53.67

ELBOW HOSE - ISB

Genuine Cummins Part

$77.78

RESTRICTION INDICATOR - ISB / NH220 / NH250 / NT855

Genuine Cummins Part

$145.02

ELBOW HOSE - ISB

Genuine Cummins Part

$61.37

BENCH CALIBRATION HARNESS - ISB6.7 / ISX15

Genuine Cummins Part

$244.39

FUEL SYSTEM LEAK TESTER - ISB

Genuine Cummins Part

$183.79

PUSH ROD COVER GASKET - ISB

Genuine Cummins Part

$45.83

PLAIN HOSE - 4BT / 6BT

Genuine Cummins Part

$56.19

SEALING WASHER - ISB

Genuine Cummins Part

$16.09

VIBRATION ISOLATOR - ISB / QSB

Genuine Cummins Part

$429.36

FUEL INJECTOR PRELOAD TORQUE WRENCH - KTA19 / QSK19 / ISB / 4BT 3.9

Genuine Cummins Part

$210.52

VIBRATION ISOLATOR - ISB / QSB / ISC / QSC

Genuine Cummins Part

$19.73

UNLOADING VALVE BODY - ISB / ISM / QSM / ISC / QSC / L10

Genuine Cummins Part

$316.68

EXHAUST CLAMP - ISB

Genuine Cummins Part

$78.49

TURBO MOUNTING STUD NUT - ISB240 / 6B5.9 / ISB / ISC350

Genuine Cummins Part

$5.80

MOLDED HOSE - ISB / ISC / QSC

Genuine Cummins Part

$51.20

PLAIN HOSE - 4BT / 6BT

Genuine Cummins Part

$27.61

FLEXIBLE HOSE - ISB / ISC / QSC

Genuine Cummins Part

$246.27

FLEXIBLE HOSE - 6B5.9

Genuine Cummins Part

$214.96

FLEXIBLE HOSE - ISB

Genuine Cummins Part

$74.70

FLEXIBLE HOSE - ISB

Genuine Cummins Part

$215.72

PLAIN HOSE - ISB / ISC / QSC

Genuine Cummins Part

$103.89

FLYWHEEL RING GEAR - 4B 3.9 / B 4.5 / 6B 5.9 / ISB 6.7

Genuine Cummins Part

$301.73

RECTANGULAR RING SEAL - ISB3.9 / ISB4.5 / ISB5.9G / QSB3.9 / QSB4.5

Genuine Cummins Part

$8.31

OIL SUCTION CONNECTION - 4BT / 6BT / ISB / QSB

Genuine Cummins Part

$380.78

ANGLE DRIVE ADAPTER - B SERIES / ISB

Genuine Cummins Part

$544.79

FILLER CAP - ISB / QSB (EXPANSION TANK)

Genuine Cummins Part

$59.63

OIL PAN - 4B3.9 / 6B5.9 / B4.5 / B6.7 / ISB6.7 / QSB4.5 (STAMPED STEEL)

Genuine Cummins Part

$381.17

FAN SUPPORT - ISB3.9 / ISB4.5 / ISB6.7 / QSB3.9

Genuine Cummins Part

$882.67

HEAT EXCHANGER GASKET - 4BT3.9 / 6BT / B4.5 / B5.9 / ISB3.9 / ISB4.5 / QSB3.9

Genuine Cummins Part

$24.50

HEAT EXCHANGER COVER - ISB

Genuine Cummins Part

$93.94

EXHAUST OUTLET TUBE - 4BT3.9 / 6BT5.9 / ISB3.9 / QSB3.9 / QSB4.5

Genuine Cummins Part

$255.00

ENGINE FAN - 4BT / 6BT / ISB 6.7L / 6CTA 8.3L

BLOWER TYPE, 18" DIAMETER, 7 BLADES, PLASTIC
Genuine Cummins Part

$560.15

ENGINE HEATER - 4B3.9 / B4.5 / B5.9 / B6.7 / ISB6.7 / QSB

Genuine Cummins Part

$2,768.83

ENGINE FAN - 4BT / 6BT / ISB 6.7L (SUCKER TYPE, 20" DIAMETER, 10 BLADES, PLASTIC)

Genuine Cummins Part

$664.72

ELBOW HOSE - ISB

Genuine Cummins Part

$68.52

ENGINE FAN - 4BT / 6BT / ISB 6.7L (SUCKER TYPE, 22" DIAMETER, 6 BLADES, METAL)

Genuine Cummins Part

$702.00

FAN PULLEY - B Series / ISB / QSB / 6CTA / ISC / QSC

Genuine Cummins Part

$149.89

FAN PULLEY - ISB / QSB

Genuine Cummins Part

$149.26

CRANKSHAFT PULLEY - ISB / QSB / ISC / QSC

Genuine Cummins Part

$137.73

SEALING WASHER - 4BT3.9 / 6BT5.9 / ISB3.9 / ISB4.5 / QSB3.9 / QSB4.5

Genuine Cummins Part

$9.54

TEMPERATURE GAUGE - B SERIES / ISB

Genuine Cummins Part

$578.47

FLEXIBLE HOSE - 4BT / 6BT

Genuine Cummins Part

$104.05

VACUUM PUMP BRACE - ISB

Genuine Cummins Part

$108.56

ALTERNATOR BRACE - ISB / B SERIES

Genuine Cummins Part

$174.97

EXHAUST OUTLET CONNECTION GASKET - 4BT3.9 / 6BT5.9 / ISB3.9 / QSB3.9

Genuine Cummins Part

$24.91

INTAKE AIR HEATER - 4B3.9 / B4.5 / B5.9 / B6.7 / ISB6.7 / QSB

Genuine Cummins Part

$511.44

ALTERNATOR SUPPORT - 4B3.10 / 6B5.10 / ISB3.9 / ISB4.5 / QSB3.9 / QSB4.5

Genuine Cummins Part

$132.83

BELT TENSIONER BRACKET - ISB

Genuine Cummins Part

$192.92

WATER INLET CONNECTION - 4BT / 6BT / ISB / QSB

Genuine Cummins Part

$1,553.00

DIPSTICK - ISB

Genuine Cummins Part

$137.73

TURBOCHARGER OIL DRAIN CONNECTION - ISB

Genuine Cummins Part

$143.05

FLEXIBLE HOSE - ISB / QSB

Genuine Cummins Part

$121.45

ELBOW HOSE - ISB

Genuine Cummins Part

$56.36

COVER PLATE GASKET - 4BT3.9 / 6BT / ISB3.9 / ISB4.5 / QSB3.9 / QSB4.5

Genuine Cummins Part

$7.59

PISTON PIN - NH220 / NH250 / NT855 / ISB / QSB / ISB

Genuine Cummins Part

$70.16

WATER INLET CONNECTION - 4BT / 6BT / ISB / QSB

Genuine Cummins Part

$91.25

SPEED INDICATOR RING - 4B3.9 / 6B5.9 / ISB6.7 / QSB5.9

Genuine Cummins Part

$146.23

EXHAUST MANIFOLD BOLT - ISB / ISC / 6B5.9

Genuine Cummins Part

$7.01

MOUNTING SPACER - ISC350 / ISL400 / ISLG320 / QSB6.7 / ISC330 / ISB / B5.9-A200

Genuine Cummins Part

$11.58

ZINC ELECTRODE PLUG - ISM / QSM / ISB / QSB / ISB

Genuine Cummins Part

$62.28

SEALING WASHER - 4BT3.9 / 6BT5.9 / ISB3.9 / ISB4.5 / QSB3.9 / QSB4.5

Genuine Cummins Part

$7.27

STARTER - 4B3.9 / B4.5 / B6.7 / ISB6.7 / QSB4.5 / QSB5.9 (12 V)

Genuine Cummins Part

$1,017.15

VIBRATION ISOLATOR - ISB / QSB / ISC / QSC

Genuine Cummins Part

$545.74

WIRING HARNESS - ISB

Genuine Cummins Part

$510.19

WIRING HARNESS - ISB

Genuine Cummins Part

$1,077.45

WIRING HARNESS - ISB

Genuine Cummins Part

$142.54

SPEED INDICATOR RING - 4B3.9 / 6B5.9 / 6C8.3 / ISC8.3 / QSC8.3 / QSB5.9

Genuine Cummins Part

$130.58

FUEL SUPPLY TUBE - 4B3.9 / ISB / QSB3.9 / QSB4.5

Genuine Cummins Part

$150.63

VIBRATION ISOLATOR - ISB

Surplus Item - Special Pricing Genuine Cummins Part

$12.73

FLYWHEEL RING GEAR - 4B3.9 / 6B5.9 / B4.5 / B5.9 / B6.7 / ISB6.7

Genuine Cummins Part

$316.13

IDLER PULLEY - ISB / QSB

Genuine Cummins Part

$223.69

FLEXIBLE HOSE - ISB

Genuine Cummins Part

$116.58

MOLDED HOSE - ISB

Genuine Cummins Part

$64.73

FLEXIBLE HOSE - ISB

Genuine Cummins Part

$396.02

STATOR REPAIR KIT - 4B3.9 / B4.5 / B5.9 / B6.7 / ISB6.7 / QSB

Genuine Cummins Part

$194.45

VACUUM PUMP REPAIR KIT - 4B3.9 / 6B5.9 / ISB / ISD

Genuine Cummins Part

$34.07

AIR CLEANER ELEMENT - ISB

Genuine Cummins Part

$807.73

CRANKCASE BREATHER COVER - ISB

Genuine Cummins Part

$311.23

ROCKER LEVER HOUSING - ISB

Genuine Cummins Part

$340.09

IDLER PULLEY - ISB / QSB / ISC / QSC

Genuine Cummins Part

$264.19

O-RING SEAL - ISB3.9 / ISB4.5 / ISB5.9G / ISB6.7 / QSB3.9 / QSB4.5

Genuine Cummins Part

$3.23

ALTERNATOR PULLEY - ISB / QSB / ISC / QSC

Genuine Cummins Part

$199.83

FAN PULLEY - ISB / QSB / ISC / QSC

Genuine Cummins Part

$147.10

ALTERNATOR - B SERIES / ISB

Genuine Cummins Part

$1,205.02

ALTERNATOR - ISB

Genuine Cummins Part

$841.13

DOSER PUMP TESTER - ISB / QSB

Genuine Cummins Part

$375.38

ALTERNATOR - ISB

Genuine Cummins Part

$971.89

AFTERCOOLER - ISB / B SERIES

$7,807.70

V-BAND CLAMP - ISB / ISC / QSC

Genuine Cummins Part

$91.82

DIAGNOSTIC FUEL LINE - ISB

Genuine Cummins Part

$523.24

PLAIN HOSE - ISB

Genuine Cummins Part

$33.81

CRANKCASE VENTILATION FILTER KIT - ISB

$209.10

UNLOADER VALVE CAP - ISB / ISC / QSC

$44.34

CLAMP - ISB / ISX / QSX / ISC / QSC

$40.23

V-BAND CLAMP - ISB / ISC / QSC

$33.36

PUSH ROD COVER GASKET - 4B3.9 / B4.5 / QSB4.5 / B3.9-C130

$11.31

ETR FUEL CONTROL ACTUATOR - ISB / NH SERIES

$814.35

TURBOCHARGER GASKET - ISB / QSB

$6.93

TURBO MOUNTING STUD - ISC350 / C8.3-C215 / B5.9 / 6C8.3 / ISB-RV275 / ISC300 / C8.3-P

$7.04