BB Overstock Parts Shop Genuine OEM Parts by Leading Truck Brands

Shop Genuine OEM Parts by Leading Truck Brands

Browse our extensive inventory of authentic overstock parts organized by the manufacturers you trust. At BB Overstock, we specialize in providing factory-original components from the industry's most reliable brands, including Cummins, Mack, Volvo, PACCAR, Bendix, and Whelen.

Whether you are looking for high-performance engine hardware, critical braking valves, or specialized safety lighting, shopping by brand ensures you get the exact engineering standards and fitment required for your specific vehicle. By sourcing genuine overstock, we offer the same premium quality found at the dealership but at a fraction of the cost—without the hassle of aftermarket compatibility issues. Select a brand below to view its full range of components, from internal engine gears to exterior lighting and cab accessories.

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Title: Genuine Red Dot RD-5-6868-0 Block-Type A/C Expansion Valve – OEM Heavy-Duty HVAC
Title: Genuine Red Dot RD-5-6868-0 Block-Type A/C Expansion Valve – OEM Heavy-Duty HVAC

Genuine Red Dot RD-5-6868-0 Block-Type A/C Expansion Valve – OEM Heavy-Duty HVAC

Regular price $29.96
Sale price $29.96 Regular price $48.43
Unit price
Genuine Cummins 3027924 Connection Gasket (L10, M11, ISM)
Genuine Cummins 3027924 Connection Gasket (L10, M11, ISM)

Genuine Cummins 3027924 Connection Gasket (L10, M11, ISM)

Regular price $0.80
Sale price $0.80 Regular price $3.09
Unit price
Genuine Cummins 5264570 Oil Drain Gasket | Turbocharger Return Seal | Fits ISX15, QSX15, ISM
Genuine Cummins 5264570 Oil Drain Gasket | Turbocharger Return Seal | Fits ISX15, QSX15, ISM

Genuine Cummins 5264570 Oil Drain Gasket | Turbocharger Return Seal | Fits ISX15, QSX15, ISM

Regular price $3.95
Sale price $3.95 Regular price $8.47
Unit price
Genuine Cummins 3682064 Hex Flange Head Cap Screw | Fits ISX15, QSX15, ISX12 | Engine Bolt
Genuine Cummins 3682064 Hex Flange Head Cap Screw | Fits ISX15, QSX15, ISX12 | Engine Bolt

Genuine Cummins 3682064 Hex Flange Head Cap Screw | Fits ISX15, QSX15, ISX12 | Engine Bolt

Regular price $4.95
Sale price $4.95 Regular price $12.49
Unit price
Genuine Cummins 3687214 Grommet Seal | Fuel System Pass-Through Seal | Fits ISX12, ISX15, QSX15
Genuine Cummins 3687214 Grommet Seal | Fuel System Pass-Through Seal | Fits ISX12, ISX15, QSX15

Genuine Cummins 3687214 Grommet Seal | Fuel System Pass-Through Seal | Fits ISX12, ISX15, QSX15

Regular price $7.95
Sale price $7.95 Regular price $28.99
Unit price
Rig Force RF20550690 silicone charge air cooler hump hose for Volvo and Mack trucks.
Rig Force RF20550690 silicone charge air cooler hump hose for Volvo and Mack trucks.

Rig Force RF20550690 Charge Air Cooler (CAC) Hose | Fits Volvo D13 & Mack Engines | Replaces 20550690

Regular price $34.95
Sale price $34.95 Regular price $55.00
Unit price
Genuine Cummins Turbo-To-Manifold Gasket 3901356 | T3 Flange for 5.9L B-Series
Genuine Cummins Turbo-To-Manifold Gasket 3901356 | T3 Flange for 5.9L B-Series

Genuine Cummins Turbo-To-Manifold Gasket 3901356 | T3 Flange for 5.9L B-Series

Regular price $6.95
Sale price $6.95 Regular price $14.23
Unit price
Exhaust Manifold Lock Plate Set 5 PACK
Exhaust Manifold Lock Plate Set 5 PACK

Genuine Mack 87GC132 Exhaust Manifold Lock Plates | Pack of 5 | 2-Valve Horizontal

Regular price $35.95
Sale price $35.95 Regular price $60.00
Unit price
Genuine Paccar 1876688 engine O-ring seal for MX-13 cooling systems.
Genuine Paccar 1876688 engine O-ring seal for MX-13 cooling systems.

Genuine Paccar 1876688 O-Ring Seal | Fits Paccar MX-13 Engines | MX13 Coolant Connection Seal

Regular price $8.67
Sale price $8.67 Regular price $15.71
Unit price
Genuine Mack 2MR2149 5-pin 12V relay switch for commercial trucks.
Genuine Mack 2MR2149 5-pin 12V relay switch for commercial trucks.

Genuine Mack 2MR2149 Relay Switch | 12V 35/20 AMP 5-Pin | Fits Horn & Engine Brake

Regular price $9.95
Sale price $9.95 Regular price $19.95
Unit price
Genuine Cummins 4954574 exhaust gas temperature sensor with 2-pin connector and M12 threads.
Genuine Cummins 4954574 exhaust gas temperature sensor with 2-pin connector and M12 threads.

Genuine Cummins 4954574 Exhaust Gas Temperature (EGT) Sensor | EPA07 2.8L ISF/QSF, ISM, M11

Regular price $79.98
Sale price $79.98 Regular price $216.56
Unit price
Genuine Mack 301SQ 47E tapered king pin kit with bronze bushings and accessories
Genuine Mack 301SQ 47E tapered king pin kit with bronze bushings and accessories

Genuine Mack 301SQ 47E King Pin Set | Fits Mack FA532, FAW536, FAW537 Axles

Regular price $145.23
Sale price $145.23 Regular price $448.60
Unit price
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