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Freightliner M2 Business Class Parts

The Freightliner M2 Business Class semi-truck is a solid medium-duty truck that offers the versatility and reliability you'd expect from Freightliner, but we can make you stand out even more by customizing your semi truck with quality parts and chrome accessories from 4 State Trucks. When you drive an M2 Business Class, you'll enjoy top-notch features like maneuverability, roomy interior, and great driver visibility that make it fun and easy to keep your truck on the road. Whether you need bumpers, exhaust, fuel tanks, or any other aftermarket or custom parts for your M2, 4 State Trucks has got you covered - shop our selection of Freightliner parts today.
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  • BESTfit Detroit Diesel DPF For Detroit DD13/DD15 Engines Replaces 6804913594, AP70116, GESI0051

    BESTfit Detroit Diesel DPF For Detroit DD13/DD15 Engines Replaces 6804913594, AP70116, GESI0051

    BESTFIT TRUCK PARTS

    $992.99
    DPF By BESTfit Replaces 6804913594, AP70116, GESI0051 Fits Detroit DD13/DD15 EnginesUpgrade your emissions system with the BESTfit Detroit Diesel DPF, a direct replacement for OEM part numbers...
    29-08090006
    SKU:
    29-08090006
    Product Type:
    Exhaust
    Style Options:
    Detroit
    Make:
    Universal Items
    $992.99
    Qty in Cart: 0
    Price:
    $992.99
    Subtotal:
  • BESTfit CAT Water Pump, Replaces 1588053, 99300HD, US70 For Caterpillar 3176B, C10 & C12 Engine

    BESTfit CAT Water Pump, Replaces 1588053, 99300HD, US70 For Caterpillar 3176B, C10 & C12 Engine

    BESTFIT TRUCK PARTS

    $409.99
    Water Pump By BESTfit Replaces 1588053, 99300HD, US70 Fits Caterpillar 3176B, C10 & C12 EngineUpgrade your engine cooling system with the BESTfit CAT Water Pump, a direct replacement for OEM part...
    29-07120165
    SKU:
    29-07120165
    Style Options:
    Caterpillar
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $409.99
    Qty in Cart: 0
    Price:
    $409.99
    Subtotal:
  • BESTfit Perkins Water Pump, Replaces 2772913, 4131A062, 4854895 For Caterpillar Perkins C4.4, C6.6 & C7.1

    BESTfit Perkins Water Pump, Replaces 2772913, 4131A062, 4854895 For Caterpillar Perkins C4.4, C6.6 & C7.1

    BESTFIT TRUCK PARTS

    $182.99
    Perkins Water Pump By BESTfit Replaces 2772913, 4131A062, 4854895 Fits Caterpillar Perkins C4.4, C6.6 & C7.1Upgrade your engine cooling system with the BESTfit Perkins Water Pump, a direct...
    29-07120172
    SKU:
    29-07120172
    Product Type:
    Engine Parts
    Style Options:
    Caterpillar
    Make:
    Universal Items
    $182.99
    Qty in Cart: 0
    Price:
    $182.99
    Subtotal:
  • BESTfit Cummins NOx Sensor For Blue Bird & Freightliner Cummins ISB 6.7L Replace 5EL003, 9046003, S11295

    BESTfit Cummins NOx Sensor For Blue Bird & Freightliner Cummins ISB 6.7L Replace 5EL003, 9046003, S11295

    BESTFIT TRUCK PARTS

    $390.99
    NOx Sensor By BESTfit Replace 5EL003, 9046003, S11295 Fits Blue Bird & Freightliner Cummins ISB 6.7LUpgrade your emissions system with the BESTfit Cummins NOx Sensor, a direct replacement for OEM...
    29-08090005
    SKU:
    29-08090005
    Style Options:
    Cummins
    Product Type:
    Exhaust
    Make:
    Universal Items
    $390.99
    Qty in Cart: 0
    Price:
    $390.99
    Subtotal:
  • BESTfit CAT Water Pump, Replaces 1939239, 3522139, 2364420 For Caterpillar 3126B & C7 Engine

    BESTfit CAT Water Pump, Replaces 1939239, 3522139, 2364420 For Caterpillar 3126B & C7 Engine

    BESTFIT TRUCK PARTS

    $366.99
    Water Pump By BESTfit Replaces 1939239, 3522139, 2364420 Fits Caterpillar 3126B & C7 EngineUpgrade your engine cooling system with the BESTfit CAT Water Pump, a direct replacement for OEM part...
    29-07120175
    SKU:
    29-07120175
    Style Options:
    Caterpillar
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $366.99
    Qty in Cart: 0
    Price:
    $366.99
    Subtotal:
  • BESTfit Cummins Water Pump For Cummins L10 Engine Replaces 3255965, G3803402, WP2254

    BESTfit Cummins Water Pump For Cummins L10 Engine Replaces 3255965, G3803402, WP2254

    BESTFIT TRUCK PARTS

    $929.99
    Water Pump By BESTfit Replaces 3255965, G3803402, WP2254 Fits Cummins L10 EngineUpgrade your engine cooling system with the BESTfit Cummins Water Pump, a direct replacement for OEM part numbers...
    29-07120174
    SKU:
    29-07120174
    Product Type:
    Engine Parts
    Style Options:
    Cummins
    Make:
    Universal Items
    $929.99
    Qty in Cart: 0
    Price:
    $929.99
    Subtotal:
  • BESTfit Detroit Diesel Water Pump For Detroit 60 Series 12.7L Engine Replaces 2282335, 7141X, RW4124X

    BESTfit Detroit Diesel Water Pump For Detroit 60 Series 12.7L Engine Replaces 2282335, 7141X, RW4124X

    BESTFIT TRUCK PARTS

    $543.99
    Water Pump Engine W/ EGR By BESTfit Replaces 2282335, 7141X, RW4124X Fits Detroit 60 Series 12.7L EngineUpgrade your engine cooling system with the BESTfit Detroit Diesel Water Pump, a direct...
    29-07120161
    SKU:
    29-07120161
    Style Options:
    Cummins
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $543.99
    Qty in Cart: 0
    Price:
    $543.99
    Subtotal:
  • BESTfit Cummins Water Pump For Cummins ISX/QSX 2002-2008 Replaces 4923759, 7084X, WP04936

    BESTfit Cummins Water Pump For Cummins ISX/QSX 2002-2008 Replaces 4923759, 7084X, WP04936

    BESTFIT TRUCK PARTS

    $391.99
    Cummins Water Pump By BESTfit Replaces 4923759, 7084X, WP04936 Fits Cummins ISX/QSX 2002-2008Enhance your engine cooling system with the BESTfit Cummins Water Pump, a direct replacement for OEM part...
    29-07120168
    SKU:
    29-07120168
    Product Type:
    Engine Parts
    Style Options:
    Cummins
    Make:
    Universal Items
    $391.99
    Qty in Cart: 0
    Price:
    $391.99
    Subtotal:
  • BESTfit CAT Water Pump, Replaces US4508, 3522150, 4346107 For Caterpillar 3126 & 3116 Engine

    BESTfit CAT Water Pump, Replaces US4508, 3522150, 4346107 For Caterpillar 3126 & 3116 Engine

    BESTFIT TRUCK PARTS

    $451.99
    CAT Water Pump By BESTfit Replaces US4508, 3522150, 4346107 Fits Caterpillar 3126 & 3116 EngineUpgrade your engine cooling system with the BESTfit CAT Water Pump, a direct replacement for OEM part...
    29-07120171
    SKU:
    29-07120171
    Style Options:
    Caterpillar
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $451.99
    Qty in Cart: 0
    Price:
    $451.99
    Subtotal:
  • BESTfit Remanufactured CAT Water Pump, Replaces 2285811, 3764216, US952 For Caterpillar C13 Engine

    BESTfit Remanufactured CAT Water Pump, Replaces 2285811, 3764216, US952 For Caterpillar C13 Engine

    BESTFIT TRUCK PARTS

    $569.99
    Remanufactured Water Pump By BESTfit Replaces 2285811, 3764216, US952 Fits Caterpillar C13Built for durability and cooling efficiency, the BESTfit Remanufactured CAT Water Pump replaces OEM...
    29-07120157
    SKU:
    29-07120157
    Style Options:
    Caterpillar
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $569.99
    Qty in Cart: 0
    Price:
    $569.99
    Subtotal:
  • BESTfit CAT Water Pump, Replaces 0451056, 7016X, 3522109 For Caterpillar 3126E Engine

    BESTfit CAT Water Pump, Replaces 0451056, 7016X, 3522109 For Caterpillar 3126E Engine

    BESTFIT TRUCK PARTS

    $358.99
    CAT Water Pump By BESTfit Replaces 0451056, 7016X, 3522109 Fits Caterpillar 3126E EngineEnhance your engine cooling system with the BESTfit CAT Water Pump, a direct replacement for OEM part numbers...
    29-07120170
    SKU:
    29-07120170
    Product Type:
    Engine Parts
    Style Options:
    Caterpillar
    Make:
    Universal Items
    $358.99
    Qty in Cart: 0
    Price:
    $358.99
    Subtotal:
  • BESTfit CAT Water Pump, Replaces 2601546, 2274300, G3522080 For Caterpillar 3126E, C7 & C9 Engine

    BESTfit CAT Water Pump, Replaces 2601546, 2274300, G3522080 For Caterpillar 3126E, C7 & C9 Engine

    BESTFIT TRUCK PARTS

    $323.99
    CAT Water Pump By BESTfit Replaces 2601546, 2274300, G3522080 Fits Caterpillar 3126E, C7 & C9 EngineEnhance your engine cooling system with the BESTfit CAT Water Pump, a direct replacement for OEM...
    29-07120167
    SKU:
    29-07120167
    Style Options:
    Caterpillar
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $323.99
    Qty in Cart: 0
    Price:
    $323.99
    Subtotal:
  • BESTfit Cummins Water Pump For Cummins ISX/QSX 2002-2008 Engine Replaces 4089910RX, 6089, WP2258

    BESTfit Cummins Water Pump For Cummins ISX/QSX 2002-2008 Engine Replaces 4089910RX, 6089, WP2258

    BESTFIT TRUCK PARTS

    $469.99
    Water Pump By BESTfit Replaces 4089910RX, 6089, WP2258 Fits Cummins ISX/QSX 2002-2008Upgrade your engine cooling system with the BESTfit Cummins Water Pump, a direct replacement for OEM part numbers...
    29-07120164
    SKU:
    29-07120164
    Product Type:
    Engine Parts
    Style Options:
    Cummins
    Make:
    Universal Items
    $469.99
    Qty in Cart: 0
    Price:
    $469.99
    Subtotal:
  • BESTfit Cummins Water Pump W/ 12 Groove Pulley For Cummins ISX/ISZ Engine Replaces 181956, 3687900, 5406044

    BESTfit Cummins Water Pump W/ 12 Groove Pulley For Cummins ISX/ISZ Engine Replaces 181956, 3687900, 5406044

    BESTFIT TRUCK PARTS

    $367.99
    Water Pump W/ 12 Groove Pulley By BESTfit Replaces 181956, 3687900, 5406044 Fits Cummins ISX/ISZ EngineUpgrade your engine cooling system with the BESTfit Cummins Water Pump with 12 Groove Pulley, a...
    29-07120153
    SKU:
    29-07120153
    Style Options:
    Cummins
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $367.99
    Qty in Cart: 0
    Price:
    $367.99
    Subtotal:
  • BESTfit CAT Water Pump, Replaces 2282321, 4015, 6015 For Caterpillar C15 Non-Acert Engine

    BESTfit CAT Water Pump, Replaces 2282321, 4015, 6015 For Caterpillar C15 Non-Acert Engine

    BESTFIT TRUCK PARTS

    $568.99
    Water Pump Dome Gear Staright Cut Teeth By BESTfit Replaces 2282321, 4015, 6015 Fits Caterpillar C15 Non-Acert EngineUpgrade your engine cooling system with the BESTfit CAT Water Pump, a direct...
    29-07120163
    SKU:
    29-07120163
    Style Options:
    Caterpillar
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $568.99
    Qty in Cart: 0
    Price:
    $568.99
    Subtotal:
  • BESTfit Cummins Water Pump For Cummins ISX Engine Replaces AK2883151, US318, G2883151

    BESTfit Cummins Water Pump For Cummins ISX Engine Replaces AK2883151, US318, G2883151

    BESTFIT TRUCK PARTS

    $236.99
    Water Pump By BESTfit Replaces AK2883151, US318, G2883151 Fits Cummins ISX EngineUpgrade your engine cooling system with the BESTfit Cummins Water Pump, a direct replacement for OEM part numbers...
    29-07120160
    SKU:
    29-07120160
    Product Type:
    Engine Parts
    Style Options:
    Cummins
    Make:
    Universal Items
    $236.99
    Qty in Cart: 0
    Price:
    $236.99
    Subtotal:
  • BESTfit CAT Water Pump, Replaces 20R0586, 4P3681, 2282318 For Caterpillar 3126 & 3116 Engine

    BESTfit CAT Water Pump, Replaces 20R0586, 4P3681, 2282318 For Caterpillar 3126 & 3116 Engine

    BESTFIT TRUCK PARTS

    $309.99
    Water Pump By BESTfit Replaces 20R0586, 4P3681, 2282318 Fits Caterpillar 3126 & 3116 EngineUpgrade your engine cooling system with the BESTfit CAT Water Pump, a direct replacement for OEM part...
    29-07120162
    SKU:
    29-07120162
    Product Type:
    Engine Parts
    Style Options:
    Caterpillar
    Make:
    Universal Items
    $309.99
    Qty in Cart: 0
    Price:
    $309.99
    Subtotal:
  • BESTfit Detroit Diesel Water Pump For Detroit S50/S60 Engine Replaces 23539601, 99183, WP5026

    BESTfit Detroit Diesel Water Pump For Detroit S50/S60 Engine Replaces 23539601, 99183, WP5026

    BESTFIT TRUCK PARTS

    $444.99
    Water Pump By BESTfit Replaces 23539601, 99183, WP5026 Fits Detroit S50/S60 EngineUpgrade your engine cooling system with the BESTfit Detroit Diesel Water Pump, a direct replacement for OEM part...
    29-07120149
    SKU:
    29-07120149
    Style Options:
    Detroit
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $444.99
    Qty in Cart: 0
    Price:
    $444.99
    Subtotal:
  • BESTfit Cummins Water Pump W/ Short Shaft For Cummins L10 Replaces 4972843, 4965417, 4972850

    BESTfit Cummins Water Pump W/ Short Shaft For Cummins L10 Replaces 4972843, 4965417, 4972850

    BESTFIT TRUCK PARTS

    $409.99
    Water Pump By BESTfit Replaces 4972843, 4965417, 4972850 Fits Cummins L10Upgrade your engine cooling system with the BESTfit Cummins Water Pump Short Shaft, a direct replacement for OEM part numbers...
    29-07120159
    SKU:
    29-07120159
    Style Options:
    Cummins
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $409.99
    Qty in Cart: 0
    Price:
    $409.99
    Subtotal:
  • BESTfit Cummins Water Pump W/ Long Shaft For Cummins L10/M11 Engine Replaces 3068848, 3803260, 4965439

    BESTfit Cummins Water Pump W/ Long Shaft For Cummins L10/M11 Engine Replaces 3068848, 3803260, 4965439

    BESTFIT TRUCK PARTS

    $296.99
    Water Pump W/ Long Shaft By BESTfit Replaces 3068848, 3803260, 4965439 Fits Cummins L10/M11 EngineUpgrade your engine cooling system with the BESTfit Cummins Water Pump Long Shaft, a direct...
    29-07120156
    SKU:
    29-07120156
    Product Type:
    Engine Parts
    Style Options:
    Cummins
    Make:
    Universal Items
    $296.99
    Qty in Cart: 0
    Price:
    $296.99
    Subtotal:
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Adding your products to cart

When your Freightliner M2 Business Class is your daily workhorse, you need parts that can keep up. Whether you're hauling, delivering, or running job to job, our aftermarket parts and accessories help your rig stay sharp, strong, and road-ready.

Aftermarket Freightliner M2 Business Accessories

Our aftermarket semi truck parts are reliable, high-quality components—from front bumpers and grilles to lights, mirrors, exhausts, and more. Need engine parts to keep your powertrain smooth? Or custom touches to make your truck stand out? We’ve got it all.

Why Upgrade Your Semi Truck Parts?

- Built for performance: Get durable parts that stand up to heavy-duty jobs. - Boost your style: Chrome accents, lighting upgrades, and custom add-ons. - Fit you can trust: Designed to match the M2’s exact specs for a smooth install. - Versatile options: Perfect for owner-operators, fleets, and vocational trucks.
Whether you’re replacing worn components or tricking out your cab, the right parts make all the difference. Keep your Freightliner M2 Business Class looking great and running strong—mile after mile.

Frequently Asked Questions About Freightliner M2 Business Class Parts

What years and models of Freightliner M2 Business Class trucks do your parts fit?

Our parts are designed to fit Freightliner M2 Business Class trucks from 2003 to present. However, compatibility can vary by specific part type. For bumpers and body panels, there are typically three main design generations: 2003-2007, 2008-2017, and 2018-present. Always check the product description for exact year ranges, or contact our team with your OEM number to ensure proper fitment. Some parts may also fit the M2 106 and M2 112 variants, but verify compatibility before ordering.

Are aftermarket bumpers as durable as OEM parts, and what materials are they made from?

Quality aftermarket bumpers for the M2 Business Class are typically constructed from either heavy-duty steel (16-gauge or thicker) or high-impact ABS plastic, depending on the application. Steel bumpers often feature chrome plating or powder coating for corrosion resistance. While OEM parts meet factory specifications, many aftermarket options actually exceed OEM durability standards, especially those designed for vocational use. Look for bumpers with reinforced mounting brackets and proper drainage holes to prevent rust. We clearly specify material thickness and coating type in each product listing.

What are the most common installation challenges when replacing M2 Business Class bumpers?

The most frequent installation issues include: alignment with existing mounting holes (especially on 2008+ models where hole patterns changed), proper fitment around fog lights and sensors, and weight management during installation (steel bumpers can weigh 80-150 pounds). Many customers report needing to slightly enlarge mounting holes or use washers for proper alignment. We recommend having a second person assist with installation and using a floor jack to support the bumper during mounting. Installation typically takes 2-3 hours with basic tools, though vehicles with air dam systems or integrated step plates may require additional time.

What finish options are available, and which holds up best for different applications?

Common finishes include chrome-plated steel, polished stainless steel, painted steel, and textured plastic. For highway applications, chrome provides the classic look but requires regular maintenance to prevent pitting. Polished stainless steel costs more initially but resists corrosion better in salt-heavy regions. For vocational trucks in construction or waste management, painted steel bumpers with textured powder coating offer the best impact resistance and easy touch-up capability. Plastic bumpers work well for urban delivery trucks where weight savings and minor impact absorption are priorities.

Do I need to order additional hardware or brackets when buying a replacement bumper?

Most replacement bumpers come with new mounting brackets, but rarely include bolts, nuts, or washers. Plan to purchase Grade 8 hardware separately - typically you'll need 8-12 bolts (usually 1/2" or 5/8" diameter) with corresponding lock washers and nuts. Some installations may require bumper-to-frame adapter brackets if switching between bumper styles or upgrading from plastic to steel. Fog light brackets, license plate holders, and step plates are usually sold separately. Check if your existing hardware is reusable, but having new hardware on hand prevents installation delays.


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