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Engines & Blocks

fits Cummins
Cummins 4B, 4BT, 4BTA 3.9L, Case 4-390, 4T-390, 4TA-390 New Long Block

Cummins 2881 4BTA 3.9L — Cummins 4B, 4BT, 4BTA 3.9L, Case 4-390, 4T-390, 4TA-390 New Long Block

$6,45800
99+ 999 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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fits Cummins
Cummins 4BT 3.9L, Case 4T-390 Reman 2-Gear Internally Balanced Long Block

Cummins 2881 4BTA 3.9L — Cummins 4BT 3.9L, Case 4T-390 Reman 2-Gear Internally Balanced Long Block

$5,23500
1 Only 1 left in stock.
Remanufactured
RF ENGINE RF Engine in-house reman
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fits Cummins
Cummins 4B, 4BT, 3.9L, Case 4-390, 4T-390 Reman Long Block

Cummins 2881 4BTA 3.9L — Cummins 4B, 4BT, 3.9L, Case 4-390, 4T-390 Reman Long Block

$4,75000
99+ 999 Available and in stock.
Remanufactured
RF ENGINE RF Engine in-house reman
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fits Cummins
Cummins 4B, 4BT, 4BTA 3.9L, Case 4-390, 4T-390, 4TA-390 Reman Long Block

Cummins 2881 4BTA 3.9L — Cummins 4B, 4BT, 4BTA 3.9L, Case 4-390, 4T-390, 4TA-390 Reman Long Block

$4,75000
99+ 999 Available and in stock.
Remanufactured
RF ENGINE RF Engine in-house reman
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fits Cummins
Cummins 4BT 3.9L, Case 4T-390 New Short Block with Cylinder Head

Cummins 2881 4BTA 3.9L — Cummins 4BT 3.9L, Case 4T-390 New Short Block with Cylinder Head

$4,00000
3 Only 3 left in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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fits Cummins
Cummins 4B, 4BT, 4BTA 3.9L Rebuildable Long Block Cores | Batch of Four (4)

Cummins 2881 4BTA 3.9L — Cummins 4B, 4BT, 4BTA 3.9L Rebuildable Long Block Cores | Batch of Four (4)

$2,00000
99+ 999 Available and in stock.
Parts Core
OE CUMMINS Cummins original equipment parts
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fits Cummins
Cummins 4BT 3.9L Inframe-Engine Rebuild Kit - Turbocharged & Aftercooled (Emission)

Cummins 2881 4BTA 3.9L — Cummins 4BT 3.9L Inframe-Engine Rebuild Kit - Turbocharged & Aftercooled (Emission)

$87700
99+ 999 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Engine Kits

fits Cummins
Cummins 4B, 4BT, 4BTA 3.9L, Case 4-390, 4T-390, 4TA-390 New Long Block Kit

Cummins 2881 4BTA 3.9L — Cummins 4B, 4BT, 4BTA 3.9L, Case 4-390, 4T-390, 4TA-390 New Long Block Kit

$5,86500
99+ 999 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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fits Cummins
Inframe Engine Kit

Cummins 2881 4BTA 3.9L — Inframe Engine Kit

$72038
99+ 999 Available and in stock.
New Aftermarket
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Crankshafts & Rods

Cummins 4B, 4BT, 4BTA 3.9L, Case 4-390, 4T-390 New Crankshaft with Gear | Replaces 3907803, J908031

Cummins 2881 4BTA 3.9L — Cummins 4B, 4BT, 4BTA 3.9L, Case 4-390, 4T-390 New Crankshaft with Gear | Replaces 3907803, J908031

$71068
26 26 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B, 6B, ISB Connecting Rod | Replaces 3901566, 4943979

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B, ISB Connecting Rod | Replaces 3901566, 4943979

From $2500
99+ 150 Available and in stock.
A collection of different conditions, brands, or sizes
COLLECTION Multiple versions of the same part
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Cummins 4B, 6B, Case 4-390, 6-590 Connecting Rod Capscrew | Replaces 3900919, J900919

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B, Case 4-390, 6-590 Connecting Rod Capscrew | Replaces 3900919, J900919

$800
34 34 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cylinder Heads

fits Cummins
Cummins 4B 3.9L, Case 4-390 Reman Cylinder Head with Valves | Replaces 3929736, J933494

Cummins 2881 4BTA 3.9L — Cummins 4B 3.9L, Case 4-390 Reman Cylinder Head with Valves | Replaces 3929736, J933494

$84000
5 Only 5 left in stock.
Remanufactured
OE CUMMINS Cummins original equipment parts
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Cummins 4B 3.9L, Case 4-390 New Cylinder Head with Valves | Replaces 3929736, J933494

Cummins 2881 4BTA 3.9L — Cummins 4B 3.9L, Case 4-390 New Cylinder Head with Valves | Replaces 3929736, J933494

$80818
5 Only 5 left in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B 3.9L, Case 4-390 Cylinder Head Bolt Kit | Replaces 3920779, 3920780, 3920781

Cummins 2881 4BTA 3.9L — Cummins 4B 3.9L, Case 4-390 Cylinder Head Bolt Kit | Replaces 3920779, 3920780, 3920781

$8457
99+ 999 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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fits Cummins
Cummins 4B 3.9L, 6B 5.9L Cylinder Head Alignment Ring | Replaces 3902343, J902343

Cummins 2881 4BTA 3.9L — Cummins 4B 3.9L, 6B 5.9L Cylinder Head Alignment Ring | Replaces 3902343, J902343

$175
99+ 141 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Camshafts & Balancers

Cummins 4T390 Diesel Camshaft (3929885)

Cummins 2881 4BTA 3.9L — Cummins 4T390 Diesel Camshaft (3929885)

$49380
15 15 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4T390 Dsl Cam & Lifter Kit (HCK-CUM390A)

Cummins 2881 4BTA 3.9L — Cummins 4T390 Dsl Cam & Lifter Kit (HCK-CUM390A)

$37459
99+ 999 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B, 6B, 6C New Camshaft Gear | Replaces 3907431, J929028

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B, 6C New Camshaft Gear | Replaces 3907431, J929028

$12117
1 Only 1 left in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B, 6B, 6C, Case 4-390, 6-590, 6-830 New Camshaft Thrust Plate | Replaces 3927155, J914641

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B, 6C, Case 4-390, 6-590, 6-830 New Camshaft Thrust Plate | Replaces 3927155, J914641

$1220
9 9 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B, 6B, Case 4-390, 6-590 New Pushrod | Replaces 3904679, J923262

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B, Case 4-390, 6-590 New Pushrod | Replaces 3904679, J923262

$924
99+ 110 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B, 6B, 6C New Valve Lifter (Tappet) | Replaces 3931623, J925031

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B, 6C New Valve Lifter (Tappet) | Replaces 3931623, J925031

$726
8 8 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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fits Cummins
Cummins 4B, 6B, & 6C Camshaft Woodruff Key | Replaces 3902332

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B, & 6C Camshaft Woodruff Key | Replaces 3902332

$302
67 67 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cylinder Components

Piston & Rings

Cummins 2881 4BTA 3.9L — Piston & Rings

$16165
7 7 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Piston & Rings

Cummins 2881 4BTA 3.9L — Piston & Rings

$13542
8 8 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B, 6B Piston Kit STD 3802757, 3930187, 225-3322

Cummins 2881 4BTA 3.9L — Fits Cummins 4B, 6B Piston Kit STD 3802757, 3930187, 225-3322

$12906
26 26 Available and in stock.
New Aftermarket
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Piston Ring Set

Cummins 2881 4BTA 3.9L — Piston Ring Set

$4198
26 26 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Piston Ring Set

Cummins 2881 4BTA 3.9L — Piston Ring Set

$4198
0 Sorry, currently out of stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins B Series (3.9L, 5.9L) Turbo & Non-Turbo Piston Ring Set 3802750

Cummins 2881 4BTA 3.9L — Fits Cummins 4B, 6B, 4BT Piston Rings New 3802750

$3180
23 23 Available and in stock.
New Aftermarket
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Cummins 4B, 6B, ISB, QSB, Komatsu S4D102, S6D102 Cylinder Repair Sleeve | Replaces 3904166

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B, ISB, QSB, Komatsu S4D102, S6D102 Cylinder Repair Sleeve | Replaces 3904166

$2208
78 78 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins Piston Pin, 3934047

Cummins 2881 4BTA 3.9L — Cummins Piston Pin, 3934047

$1636
76 76 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Bearings & Bushings

Cummins 4B, 6B, 6C, QSB, ISB, QSC Fan Drive Bearing | Replaces 3910739, J910739

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B, 6C, QSB, ISB, QSC Fan Drive Bearing | Replaces 3910739, J910739

$8150
9 9 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B 3.9L, Case 4-390, Komatsu S4D102 Main Bearing Set | Replaces 3802010, 3802011

Cummins 2881 4BTA 3.9L — Cummins 4B 3.9L, Case 4-390, Komatsu S4D102 Main Bearing Set | Replaces 3802010, 3802011

From $4681
99+ 247 Available and in stock.
A collection of different conditions, brands, or sizes
COLLECTION Multiple versions of the same part
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fits Cummins
Cummins 4B, 6B, ISB Fracture-Split Connecting Rod Bearing | Replaces 3969562, 4893693

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B, ISB Fracture-Split Connecting Rod Bearing | Replaces 3969562, 4893693

From $1335
99+ 769 Available and in stock.
A collection of different conditions, brands, or sizes
COLLECTION Multiple versions of the same part
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fits Cummins
Cummins 4B, 6B, ISB Machine-Split Connecting Rod Bearing | Replaces 3901170, 3901171, 3901172

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B, ISB Machine-Split Connecting Rod Bearing | Replaces 3901170, 3901171, 3901172

From $1175
99+ 4944 Available and in stock.
A collection of different conditions, brands, or sizes
COLLECTION Multiple versions of the same part
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Cummins 4B, 6B, QSB, ISB Piston Pin Bushing | Replaces 4891178, J901085

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B, QSB, ISB Piston Pin Bushing | Replaces 4891178, J901085

$1087
99+ 1996 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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fits Cummins
Cummins 4B, 6B, ISB, QSB, Case 4-390, 6-590 Camshaft Bushing | Replaces 3940059, 3901306

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B, ISB, QSB, Case 4-390, 6-590 Camshaft Bushing | Replaces 3940059, 3901306

From $508
99+ 2589 Available and in stock.
A collection of different conditions, brands, or sizes
COLLECTION Multiple versions of the same part
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Gaskets & Seals

Cummins 4BT, 4BTA3.9L Diesel Conversion Gasket Set, RP331175

Cummins 2881 4BTA 3.9L — Cummins 4BT, 4BTA3.9L Diesel Conversion Gasket Set, RP331175

$20201
6 6 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B, 4BT, 4BTA, Case 4-390, 4T-390, 4TA-390 Head Gasket Set | Replaces 3804896, 3802361

Cummins 2881 4BTA 3.9L — Cummins 4B, 4BT, 4BTA, Case 4-390, 4T-390, 4TA-390 Head Gasket Set | Replaces 3804896, 3802361

$8170
99+ 145 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B, 6B, ISB, QSB, 6C Rear Crankshaft Wear Sleeve | Replaces 3906081, J906081

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B, ISB, QSB, 6C Rear Crankshaft Wear Sleeve | Replaces 3906081, J906081

$4651
42 42 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B, 6B, ISB, QSB, 6C Rear Crankshaft Seal Kit | Replaces 3926126, A77810

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B, ISB, QSB, 6C Rear Crankshaft Seal Kit | Replaces 3926126, A77810

$4610
99+ 739 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B, 6B, ISB, QSB, 6C Rear Crankshaft Seal | Replaces 3909411, J955372

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B, ISB, QSB, 6C Rear Crankshaft Seal | Replaces 3909411, J955372

$3746
2 Only 2 left in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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fits Cummins
Cummins 4B 3.9L, 6B 5.9L Expansion Plug Kit | Replaces 3900687, 3922072, 3922073

Cummins 2881 4BTA 3.9L — Cummins 4B 3.9L, 6B 5.9L Expansion Plug Kit | Replaces 3900687, 3922072, 3922073

From $3413
35 35 Available and in stock.
A collection of different conditions, brands, or sizes
COLLECTION Multiple versions of the same part
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Cummins 4B, 6B, ISB, QSB, 6C Rear Crankshaft Seal | Replaces 4089342, A77809

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B, ISB, QSB, 6C Rear Crankshaft Seal | Replaces 4089342, A77809

$3195
23 23 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B, 6B, QSB, ISB Front Crankshaft Wear Sleeve | Replaces 3906080

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B, QSB, ISB Front Crankshaft Wear Sleeve | Replaces 3906080

$3110
11 11 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B, 6B, QSB, ISB Front Crankshaft Seal | Replaces 3900709, J904353

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B, QSB, ISB Front Crankshaft Seal | Replaces 3900709, J904353

$2098
99+ 208 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B, 4BT, 4BTA 3.9L, Case 4-390, 4T-390 Oil Pan Gasket | Replaces 3938162, 3931602

Cummins 2881 4BTA 3.9L — Cummins 4B, 4BT, 4BTA 3.9L, Case 4-390, 4T-390 Oil Pan Gasket | Replaces 3938162, 3931602

$1125
99+ 102 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B, 6B Oil Cooler Gasket | Replaces 3926760, J942914

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B Oil Cooler Gasket | Replaces 3926760, J942914

$993
12 12 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 6BT, 6BTA5.9L Diesel Oil Cooler Gasket, 3942915

Cummins 2881 4BTA 3.9L — Cummins 6BT, 6BTA5.9L Diesel Oil Cooler Gasket, 3942915

$894
72 72 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B, 6B Oil Filter Head Seat Gasket | Replaces 3929792, J912532

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B Oil Filter Head Seat Gasket | Replaces 3929792, J912532

$844
20 20 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B, 4BT, 4BTA, QSB Pushrod Cover Gasket | Replaces 3283767, J283767

Cummins 2881 4BTA 3.9L — Cummins 4B, 4BT, 4BTA, QSB Pushrod Cover Gasket | Replaces 3283767, J283767

$754
2 Only 2 left in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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fits Cummins
Cummins Expansion Plug (2.288" / 58mm) | Replaces 3922072, A77782, 3812090

Cummins 2881 4BTA 3.9L — Cummins Expansion Plug (2.288" / 58mm) | Replaces 3922072, A77782, 3812090

$429
99+ 445 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B, 6B Valve Cover Gasket | Replaces 3930906, 2852033

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B Valve Cover Gasket | Replaces 3930906, 2852033

$423
99+ 491 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B, 6B Rear Camshaft Expansion Plug | Replaces 3900687, J900687

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B Rear Camshaft Expansion Plug | Replaces 3900687, J900687

$275
21 21 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B, 6B, 6C Oil Pan Side Plug Sealing Washer | Replaces 3902425, 676136C2

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B, 6C Oil Pan Side Plug Sealing Washer | Replaces 3902425, 676136C2

$116
38 38 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Valve Hardware

Cummins 4B, Case 4-390, Komatsu S4D102 New Valve Train Kit | Replaces 3802356, 3802355

Cummins 2881 4BTA 3.9L — Cummins 4B, Case 4-390, Komatsu S4D102 New Valve Train Kit | Replaces 3802356, 3802355

$15969
99+ 999 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B, 6B, Case 4-390, 6-590 New Valve Stem Cap | Replaces 3910412, J280911

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B, Case 4-390, 6-590 New Valve Stem Cap | Replaces 3910412, J280911

$7363
0 Sorry, currently out of stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B, 6B, Case 4-390, 6-590 New Rocker Arm Stand & Shaft | Replaces 3910814, J922488

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B, Case 4-390, 6-590 New Rocker Arm Stand & Shaft | Replaces 3910814, J922488

$5571
0 Sorry, currently out of stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B, 6B, Case 4-390, 6-590 New Exhaust Rocker Arm | Replaces 3910810, J910810

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B, Case 4-390, 6-590 New Exhaust Rocker Arm | Replaces 3910810, J910810

$2182
40 40 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B, 6B, Case 4-390, 6-590 New Intake Rocker Arm | Replaces 3910811, J910811

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B, Case 4-390, 6-590 New Intake Rocker Arm | Replaces 3910811, J910811

$2094
23 23 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B, 6B, Case 4-390, 6-590 New Exhaust Valve | Replaces 3802356, J902868

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B, Case 4-390, 6-590 New Exhaust Valve | Replaces 3802356, J902868

$1152
99+ 267 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B, 6B, Case 4-390, 6-590 New Intake Valve | Replaces 3802355, J901117

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B, Case 4-390, 6-590 New Intake Valve | Replaces 3802355, J901117

$783
99+ 236 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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fits Cummins
Cummins Valve Seat

Cummins 2881 4BTA 3.9L — Cummins Valve Seat

$609
14 14 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B, 6B, Case 4-390, 6-590 New Valve Spring | Replaces 3900276, J900276

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B, Case 4-390, 6-590 New Valve Spring | Replaces 3900276, J900276

$426
99+ 576 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B, 6B Intake & Exhaust Valve Guide Repair Insert | Replaces 3906206, J906206

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B Intake & Exhaust Valve Guide Repair Insert | Replaces 3906206, J906206

$418
37 37 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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fits Cummins
Cummins Valve Seat

Cummins 2881 4BTA 3.9L — Cummins Valve Seat

$357
69 69 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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fits Cummins
Cummins Valve Seat

Cummins 2881 4BTA 3.9L — Cummins Valve Seat

$341
16 16 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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fits Cummins
Cummins Valve Seat

Cummins 2881 4BTA 3.9L — Cummins Valve Seat

$325
19 19 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B, 6B, QSB New Exhaust Valve Guide | Replaces 3904409, J904409

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B, QSB New Exhaust Valve Guide | Replaces 3904409, J904409

$279
52 52 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B, 6B, QSB New Intake Valve Guide | Replaces 3904408, J904408

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B, QSB New Intake Valve Guide | Replaces 3904408, J904408

$276
30 30 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B, 6B, QSB New Valve Spring Retainer | Replaces 3900299, J957913

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B, QSB New Valve Spring Retainer | Replaces 3900299, J957913

$274
99+ 137 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4T390 Diesel Valve Spring (3932453)

Cummins 2881 4BTA 3.9L — Cummins 4T390 Diesel Valve Spring (3932453)

$254
24 24 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B 3.9L, 6B 5.9L Diesel Valve Seal, 3921640

Cummins 2881 4BTA 3.9L — Cummins 4B 3.9L, 6B 5.9L Diesel Valve Seal, 3921640

$204
0 Sorry, currently out of stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B, 6B, QSB, QSC, QSL New Valve Spring Lock | Replaces 3900250, J900250

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B, QSB, QSC, QSL New Valve Spring Lock | Replaces 3900250, J900250

$081
99+ 304 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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fits Cummins
Cummins 4B 3.9L, 6B 5.9L, ISB, QSB New Valve Spring Locks | Replaces 3940123, J940123

Cummins 2881 4BTA 3.9L — Cummins 4B 3.9L, 6B 5.9L, ISB, QSB New Valve Spring Locks | Replaces 3940123, J940123

$077
50 50 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Timing & Gear Train

Cummins 4B 3.9L, 6B 5.9L, QSB 5.9L, 6C 8.3L New Belt Tensioner | Replaces 3934817, J937553

Cummins 2881 4BTA 3.9L — Cummins 4B 3.9L, 6B 5.9L, QSB 5.9L, 6C 8.3L New Belt Tensioner | Replaces 3934817, J937553

$9177
1 Only 1 left in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B 3.9L, 6B 5.9L New Crankshaft Gear | Replaces 3929027, 3901258

Cummins 2881 4BTA 3.9L — Cummins 4B 3.9L, 6B 5.9L New Crankshaft Gear | Replaces 3929027, 3901258

$6388
99+ 130 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Fuel System

Case International Fuel Pump (87473339, 87648709, J936316)

Cummins 2881 4BTA 3.9L — Case International Fuel Pump (87473339, 87648709, J936316)

$9263
5 Only 5 left in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Lubrication System

Cummins 4B, 4BT, 4BTA 3.9L, Case 4-390, 4T-390, 4TA-390 Engine Oil Pump | Replaces 3937027, J926202

Cummins 2881 4BTA 3.9L — Cummins 4B, 4BT, 4BTA 3.9L, Case 4-390, 4T-390, 4TA-390 Engine Oil Pump | Replaces 3937027, J926202

$10314
34 34 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B 3.9L, 6B 5.9L New Oil Filter Head Seat | Replaces 3913967, 3918288

Cummins 2881 4BTA 3.9L — Cummins 4B 3.9L, 6B 5.9L New Oil Filter Head Seat | Replaces 3913967, 3918288

$8995
1 Only 1 left in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B 3.9L, 6B 5.9L Piston Cooling Nozzle | Replaces 3901020, 3937214

Cummins 2881 4BTA 3.9L — Cummins 4B 3.9L, 6B 5.9L Piston Cooling Nozzle | Replaces 3901020, 3937214

From $052
85 85 Available and in stock.
A collection of different conditions, brands, or sizes
COLLECTION Multiple versions of the same part
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Air System

fits Cummins
Cummins 4B, 4BT, 4BTA 3.9L, Case 4-390, 4T-390, 4TA-390 Intake Manifold Gasket | Replaces 3914028

Cummins 2881 4BTA 3.9L — Cummins 4B, 4BT, 4BTA 3.9L, Case 4-390, 4T-390, 4TA-390 Intake Manifold Gasket | Replaces 3914028

$443
30 30 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B 3.9L, 6B 5.9L, ISB, QSB New Exhaust Manifold Bolt | Replaces 3901448, 3944593

Cummins 2881 4BTA 3.9L — Cummins 4B 3.9L, 6B 5.9L, ISB, QSB New Exhaust Manifold Bolt | Replaces 3901448, 3944593

$401
99+ 663 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cooling System

Cummins 4B, 4BT, 4BTA 3.9L, Case 4-390, 4T-390, 4TA-390 New Engine Oil Cooler | Replaces 3957543, J921557

Cummins 2881 4BTA 3.9L — Cummins 4B, 4BT, 4BTA 3.9L, Case 4-390, 4T-390, 4TA-390 Engine Oil Cooler | Replaces 3957543, J921557

$9432
6 6 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Cummins 4B 3.9L, 6B 5.9L, Case 4-390, 6-590 Water Pump | Replaces 3286277, 4935793, J802970

Cummins 2881 4BTA 3.9L — Cummins 4B 3.9L, 6B 5.9L, Case 4-390, 6-590 Water Pump | Replaces 3286277, 4935793, J802970

$7825
73 73 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Thermostat

Cummins 2881 4BTA 3.9L — Thermostat

$4652
33 33 Available and in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Drivetrain & Hydraulics

fits Cummins
Cummins 4B, 6B New SAE 3 Flywheel with 159-Tooth Ring Gear | Replaces 3973747

Cummins 2881 4BTA 3.9L — Cummins 4B, 6B New SAE 3 Flywheel with 159-Tooth Ring Gear | Replaces 3973747

$29229
3 Only 3 left in stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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Sheet Metal & Housings

fits Cummins
Cummins 4B, 4BT, 4BTA 3.9L Used Aluminum Flywheel Housing | Replaces 3931714

Cummins 2881 4BTA 3.9L — Cummins 4B, 4BT, 4BTA 3.9L Used Aluminum Flywheel Housing | Replaces 3931714

$32500
1 Only 1 left in stock.
Used
OE CUMMINS Cummins original equipment parts
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fits Cummins
Cummins 4B, 4BT, 4BTA 3.9L Front / Rear Sump Oil Pan | Replaces 3901049

Cummins 2881 4BTA 3.9L — Cummins 4B, 4BT, 4BTA 3.9L Front / Rear Sump Oil Pan | Replaces 3901049

From $7874
23 23 Available and in stock.
A collection of different conditions, brands, or sizes
COLLECTION Multiple versions of the same part
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Accessories & Supplies

Cummins 6BTA5.9L Diesel Injection Pump Drive Gear, 3931382

Cummins 2881 4BTA 3.9L — Cummins 6BTA5.9L Diesel Injection Pump Drive Gear, 3931382

$9744
0 Sorry, currently out of stock.
New Aftermarket
RELIANCE Reliance brand replacement parts
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© RF Engine is a Nivel HD brand. All manufacturer names, numbers, symbols & descriptions are for reference purposes only. It is not implied in any way that the items listed here are a product of the manufacturer referenced. OEM makes are registered trademarks of their respective owners.
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