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888.687.0539

Our office will be closed 9/7/2026 in observance of Labor Day. Orders placed during this time will be processed when our office opens 9/8/2026.

Our office will be closed 9/7/2026 in observance of Labor Day. Orders placed during this time will be processed when our office opens 9/8/2026.

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Parts for Cummins 4BT 3.9 and 6BT 5.9 Engines

Cummins 4BT/6BT Parts

We carry a wide selection of parts including alternators, starters, hoses, and fans for Cummins 4BT 3.9 and 6BT 5.9 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.

116936

MALE ADAPTER ELBOW - ISB / KTA19 / QSK19

Genuine Cummins Part

$54.58

176743

ELBOW HOSE - ISB

Genuine Cummins Part

$79.10

178957

RESTRICTION INDICATOR - ISB / NH220 / NH250 / NT855

Genuine Cummins Part

$147.44

188580

ELBOW HOSE - ISB

Genuine Cummins Part

$62.41

3164706
Hassle-Free Return Item

INJECTOR REMOVER - B / C SERIES

Genuine Cummins Part

$359.94

3281793

VIBRATION ISOLATOR - B SERIES

Genuine Cummins Part

$68.24

3284623

PUSH ROD COVER GASKET - ISB

Genuine Cummins Part

$46.39

3286499

PLAIN HOSE - 4BT / 6BT

Genuine Cummins Part

$56.93

3349230

VIBRATION ISOLATOR - ISB / QSB

Genuine Cummins Part

$436.57

3376592

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

Genuine Cummins Part

$244.46

3393944

VIBRATION ISOLATOR - ISB / QSB / ISC / QSC

Genuine Cummins Part

$18.08

3558828

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

Genuine Cummins Part

$322.00

3595658

EXHAUST CLAMP - ISB

Genuine Cummins Part

$79.82

3818824

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

Genuine Cummins Part

$5.97

3822513

TAPPET REMOVAL KIT - ISB / QSB

Genuine Cummins Part

$569.25

3824078

CRANKSHAFT REAR WEAR SLEEVE INSTALLER - ISB / QSB

Genuine Cummins Part

$313.24

3824500

CRANKSHAFT FRONT WEAR SLEEVE INSTALLER - B SERIES

Genuine Cummins Part

$232.46

3866019
Hassle-Free Return Item

MOLDED HOSE - ISB / ISC / QSC

Genuine Cummins Part

$52.05

3866540

PLAIN HOSE - 4BT / 6BT

Genuine Cummins Part

$28.06

3866565

FLEXIBLE HOSE - ISB / ISC / QSC

Genuine Cummins Part

$250.37

3897700

FLEXIBLE HOSE - ISB

Genuine Cummins Part

$219.35

3897789

PLAIN HOSE - ISB / ISC / QSC

Genuine Cummins Part

$105.64

3901774

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

Genuine Cummins Part

$306.80

3905084

HOSE,FLEXIBLE

Genuine Cummins Part

$151.23

3905206

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

Genuine Cummins Part

$387.18

3905217

ANGLE DRIVE ADAPTER - B SERIES / ISB

Genuine Cummins Part

$553.95

3907022

FILLER CAP - ISB / QSB (EXPANSION TANK)

Genuine Cummins Part

$60.63

3907570

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

Genuine Cummins Part

$445.69

3910343
Hassle-Free Return Item

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

Genuine Cummins Part

$22.43

3910344

HEAT EXCHANGER COVER - ISB

Genuine Cummins Part

$110.13

3910992

EXHAUST OUTLET CONNECTION - 4B3.9 / B4.5 / B5.9 / ISB3.9 / ISB5.9G / QSB3.9

Genuine Cummins Part

$305.46

3910993

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

Genuine Cummins Part

$259.25

3911316

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

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

$654.97

3912751

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

Genuine Cummins Part

$777.26

3912965

ELBOW HOSE - ISB

Genuine Cummins Part

$69.64

3914458

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

Genuine Cummins Part

$152.41

3914460

FAN PULLEY - ISB / QSB

Genuine Cummins Part

$151.76

3914494

CRANKSHAFT PULLEY - ISB / QSB / ISC / QSC

Genuine Cummins Part

$140.03

3918188

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

Genuine Cummins Part

$10.90

3918217

TEMPERATURE GAUGE - B SERIES / ISB

Genuine Cummins Part

$588.28

3918562

FLEXIBLE HOSE - 4BT / 6BT

Genuine Cummins Part

$105.80

3919619

VACUUM PUMP BRACE - ISB

Genuine Cummins Part

$110.40

3921961
Hassle-Free Return Item

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

Genuine Cummins Part

$25.33

3924147
Hassle-Free Return Item

THREADED PLUG - 6B5.9 / B5.9 / ISB3.9 / ISB4.5 / ISB5.9G / ISB6.7 / QSB3.9

Genuine Cummins Part

$21.04

3929108

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

Genuine Cummins Part

$598.14

3930820

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

Genuine Cummins Part

$132.12

3930838

BELT TENSIONER BRACKET - ISB

Genuine Cummins Part

$176.59

3930888

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

Genuine Cummins Part

$1,579.08

3933364

DIPSTICK - ISB

Genuine Cummins Part

$161.08

3934084

OIL DRAIN CONNECTION - B SERIES

Genuine Cummins Part

$143.14

3934085

TURBOCHARGER OIL DRAIN CONNECTION - ISB

Genuine Cummins Part

$145.46

3934396

FLEXIBLE HOSE - ISB / QSB

Genuine Cummins Part

$123.46

3934720

ELBOW HOSE - ISB

Genuine Cummins Part

$57.31

3939258
Hassle-Free Return Item

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

Genuine Cummins Part

$7.86

3939374

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

Genuine Cummins Part

$82.20

3941929

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

Genuine Cummins Part

$90.39

3942441
Restocking Fee Applies

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

Genuine Cummins Part

$148.67

3944593
Hassle-Free Return Item

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

Genuine Cummins Part

$7.24

3945252

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

Genuine Cummins Part

$13.23

3957921

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

Genuine Cummins Part

$63.36

3963988

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

Genuine Cummins Part

$7.65

3964427

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

Genuine Cummins Part

$1,034.21

3968021

VIBRATION ISOLATOR - ISB / QSB / ISC / QSC

Genuine Cummins Part

$554.90

3971321

WIRING HARNESS - ISB

Genuine Cummins Part

$1,260.16

3973161

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

Genuine Cummins Part

$153.17

3978324

IDLER PULLEY - ISB / QSB

Genuine Cummins Part

$237.82

4003445

ALTERNATOR - 4B3.9 / 6B5.9 / 6C8.3 / ISC / ISL / M11 (12 V, 130 A)

Genuine Cummins Part

$2,144.77

4020094

MOLDED HOSE - ISB

Genuine Cummins Part

$65.82

4089399

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

Genuine Cummins Part

$227.90

4089742

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

Genuine Cummins Part

$39.86

4931611

AIR CLEANER ELEMENT - ISB

Genuine Cummins Part

$944.68

4936347

CRANKCASE BREATHER COVER - ISB

Genuine Cummins Part

$362.38

4955855

MAIN BEARING SET (STANDARD) - B SERIES

Genuine Cummins Part

$280.97

4982184

O-RING SEAL - ISB / QSB

Genuine Cummins Part

$45.50

4991240
Hassle-Free Return Item

IDLER PULLEY - ISB / QSB / ISC / QSC

Genuine Cummins Part

$280.85

5272280

ALTERNATOR PULLEY - ISB / QSB / ISC / QSC

Genuine Cummins Part

$203.23

5282158

FAN PULLEY - ISB / QSB / ISC / QSC

Genuine Cummins Part

$148.94

5285862

ALTERNATOR - B SERIES / ISB

Genuine Cummins Part

$1,412.13

5316342

ALTERNATOR - ISB

Genuine Cummins Part

$988.23

5443623

AFTERCOOLER - ISB / B SERIES

$7,940.47

63549

PLAIN HOSE - ISB

Genuine Cummins Part

$34.35

DS-184240

UNLOADER VALVE CAP - ISB / ISC / QSC

$44.19

DS-3067979

CLAMP - ISB / ISX / QSX / ISC / QSC

$40.09

DS-3069053

V-BAND CLAMP - ISB / ISC / QSC

$41.81

DS-3283767
Hassle-Free Return Item

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

$11.61

DS-3408326

FUEL CONTROL ACTUATOR - KTA38 / QSK38 / NH220 / NTA855 (24V)

$886.53

DS-3519807
Hassle-Free Return Item

TURBOCHARGER GASKET - 4BT / 6BT

$1.33

DS-3559070
Hassle-Free Return Item

AIR COMPRESSOR SUPPORT - B SERIES

$209.46

DS-3818823
Restocking Fee Applies

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

$8.13

DS-3818824

HEXAGON NUT - C8.3-C215 / B5.9-M210 / ISB-RV275 / ISC350 / C8.3-P / QSB6.7

$2.53

DS-3901049
Hassle-Free Return Item

OIL PAN - 4BT

Use with DS3938162 Oil Pan Gasket

$164.92

DS-3901774
Hassle-Free Return Item

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

$62.59

DS-3903380
Hassle-Free Return Item

RETURN LINE GASKET - C8.3-250 / B5.9M / QSB5.9 / 6B5.9 / B3.9 130 / C8.3GEN

$1.91

DS-3904166

SALVAGE SLEEVE - B3.9-V110 / QSB5.9480H0 / B5.9-M330 / 6B5.9 / B5.9-C / 4B3.9

$28.56

DS-3905427
Restocking Fee Applies

FLYWHEEL RING GEAR - 4B3.9 / 6B5.9 / B4.5 / B5.9 / B6.7 / ISB6.7 (127 TEETH)

$224.60

DS-3906694
Hassle-Free Return Item

SEAL RING - 4B3.9 / 6BT5.9

$1.02

DS-3906695
Hassle-Free Return Item

GASKET - 4B3.9 / B5.9 / 6BT5.9

$0.37

DS-3906697
Hassle-Free Return Item

RECTANGULAR RING SEAL - 4BT3.9 / 6BT5.9 / ISB3.9 / ISB4.5 / QSB3.9

$1.10

DS-3906698
Hassle-Free Return Item

RECTANGULAR RING SEAL - 4BT3.9 / 6BT5.9 / ISB3.9 / ISB4.5 / QSB3.9

$1.87

DS-3908546

FLYWHEEL RING GEAR - 4B3.9 / 6B5.9 / ISB6.7 / QSB5.9 / 6C8.3 / QSC8.3 (138 TEETH)

$104.64

888.687.0539 (U.S.)|225.706.4858 (Int.)

Monday-Friday 7am-5pm CST
8784 S. Choctaw Dr. Baton Rouge, LA 70815
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