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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.
  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • 3/8 X 1/4 Inch Brass Hose Coupling W/ Spring Replaces E8595

    3/8 X 1/4 Inch Brass Hose Coupling W/ Spring Replaces E8595

    AUTOMANN USA

    $8.27
    3/8 X 1/4 Inch Hose Coupling W/ Spring* High Quality Hose Coupling* Fitting Type: Air Brake Hose* Connection: Hose Inner Diameter To Male NPT* Spring Attached To Male Connector End* Made Of Brass*...
    09-05170157
    SKU:
    09-05170157
    Material Options:
    Brass
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $8.27
    Qty in Cart: 0
    Price:
    $8.27
    Subtotal:
  • 1/2 X 3/8 Inch Brass Hose Coupling W/ Spring Replaces E8598

    1/2 X 3/8 Inch Brass Hose Coupling W/ Spring Replaces E8598

    AUTOMANN USA

    $11.93
    1/2 X 3/8 Inch Hose Coupling W/ Spring* High Quality Hose Coupling* Fitting Type: Air Brake Hose* Connection: Hose Inner Diameter To Male NPT* Spring Attached To Male Connector End* Made Of Brass*...
    09-05170160
    SKU:
    09-05170160
    Product Type:
    Air, Electrical, & Safety
    Material Options:
    Brass
    Make:
    Universal Items
    $11.93
    Qty in Cart: 0
    Price:
    $11.93
    Subtotal:
  • 3/8 X 3/8 Inch Brass Coupling Body Replaces E8586

    3/8 X 3/8 Inch Brass Coupling Body Replaces E8586

    AUTOMANN USA

    $4.48
    3/8 X 3/8 Inch Coupling Body* High Quality Hose Coupling* Fitting Type: Air Brake Hose* Connection: Hose Inner Diameter To Male NPT* Made Of Brass* 3/8 Inch Inner Diameter Hose End* 3/8 Inch Outer...
    09-05170136
    SKU:
    09-05170136
    Product Type:
    Air, Electrical, & Safety
    Diameter Options:
    3/8 Inch
    Material Options:
    Brass
    Make:
    Universal Items
    $4.48
    Qty in Cart: 0
    Price:
    $4.48
    Subtotal:
  • 1/2 X 3/8 Inch Brass Coupling Body Replaces E8588

    1/2 X 3/8 Inch Brass Coupling Body Replaces E8588

    AUTOMANN USA

    $8.47
    1/2 X 3/8 Inch Coupling Body* High Quality Hose Coupling* Fitting Type: Air Brake Hose* Connection: Hose Inner Diameter To Male NPT* Made Of Brass* 1/2 Inch Inner Diameter Hose End* 3/8 Inch Outer...
    09-05170145
    SKU:
    09-05170145
    Product Type:
    Air, Electrical, & Safety
    Material Options:
    Brass
    Make:
    Universal Items
    $8.47
    Qty in Cart: 0
    Price:
    $8.47
    Subtotal:
  • 3/8 X 1/4 Inch Brass Coupling Body Replaces E8585

    3/8 X 1/4 Inch Brass Coupling Body Replaces E8585

    AUTOMANN USA

    $5.09
    3/8 X 1/4 Inch Coupling Body* High Quality Hose Coupling* Fitting Type: Air Brake Hose* Connection: Hose Inner Diameter To Male NPT* Made Of Brass* 3/8 Inch Inner Diameter Hose End* 1/4 Inch Outer...
    09-05170135
    SKU:
    09-05170135
    Material Options:
    Brass
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $5.09
    Qty in Cart: 0
    Price:
    $5.09
    Subtotal:
  • 1/2 X 1/2 Inch Brass Coupling Body Replaces E8589

    1/2 X 1/2 Inch Brass Coupling Body Replaces E8589

    AUTOMANN USA

    $5.94
    1/2 X 1/2 Inch Coupling Body* High Quality Hose Coupling* Fitting Type: Air Brake Hose* Connection: Hose Inner Diameter To Male NPT* Made Of Brass* 1/2 Inch Inner Diameter Hose End* 1/2 Inch Outer...
    09-05170146
    SKU:
    09-05170146
    Material Options:
    Brass
    Product Type:
    Air, Electrical, & Safety
    Diameter Options:
    1/2 Inch
    Make:
    Universal Items
    $5.94
    Qty in Cart: 0
    Price:
    $5.94
    Subtotal:
  • 5.5 Automatic Slack Adjuster Replaces 40920046, 40020240, ZZ40020240, 539640020240, M808005

    5.5 Automatic Slack Adjuster Replaces 40920046, 40020240, ZZ40020240, 539640020240, M808005

    AFTERMARKET

    $154.99
    5.5 Haldex Self- Setting Type Automatic Slack AdjusterKeep your brakes perfectly calibrated with the 5.5 Automatic Slack Adjuster, a self-setting Haldex slack type adjuster engineered for accuracy...
    09-05170121
    SKU:
    09-05170121
    Product Type:
    Frame & Chassis
    Diameter Options:
    1 1/2 Inch
    Make:
    Universal Items
    $154.99
    Qty in Cart: 0
    Price:
    $154.99
    Subtotal:
  • 15.00 X 4.00 Inch 8 Hole Brake Drum Replaces 107902, 3741X, 3741, 2009641C1, 65543, 65543B, 65543F

    15.00 X 4.00 Inch 8 Hole Brake Drum Replaces 107902, 3741X, 3741, 2009641C1, 65543, 65543B, 65543F

    AFTERMARKET

    $379.99
    8 Hole 15.00 X 4.00 Inch Inch Brake Drum* High Quality Brake Drum* Balanced To 20 Inch - Oz* (8) 1 Inch Bolt Holes* For Brake Surface Diameter 15 Inch X 4 Inch* 9.04 Inch Overall Width* 4.75 Inch...
    09-05170122
    SKU:
    09-05170122
    Product Type:
    Frame & Chassis
    Make:
    Universal Items
    $379.99
    Qty in Cart: 0
    Price:
    $379.99
    Subtotal:
  • 3/8 X 1/2 Inch Brass Coupling Body Replaces E8587

    3/8 X 1/2 Inch Brass Coupling Body Replaces E8587

    AUTOMANN USA

    $4.80
    3/8 X 1/2 Inch Coupling Body* High Quality Hose Coupling* Fitting Type: Air Brake Hose* Connection: Hose Inner Diameter To Male NPT* Made Of Brass* 3/8 Inch Inner Diameter Hose End* 1/2 Inch Outer...
    09-05170134
    SKU:
    09-05170134
    Material Options:
    Brass
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $4.80
    Qty in Cart: 0
    Price:
    $4.80
    Subtotal:
  • Holland 5th Wheel Rebuild Kit Replaces RK17AL

    Holland 5th Wheel Rebuild Kit Replaces RK17AL

    AFTERMARKET

    $1,057.99
    5th Wheel Rebuild KitRestore the performance and reliability of your fifth wheel with the Holland 5th Wheel Rebuild Kit Replaces RK17AL, designed for Holland Neway FW17 5th wheels. This high-quality...
    09-0511071
    SKU:
    09-0511071
    Product Type:
    Frame & Chassis
    Make:
    Universal Items
    $1,057.99
    Qty in Cart: 0
    Price:
    $1,057.99
    Subtotal:
  • Black 4 Trumpet Mini Train Horn

    Black 4 Trumpet Mini Train Horn

    UNITED PACIFIC

    $93.99
    4 Trumpet Mini Train Horn- BlackMake safety and attention a priority with the Black 4 Trumpet Mini Train Horn, designed for truckers and drivers who need superior sound. The kit includes four durable...
    09-0513137
    SKU:
    09-0513137
    Color:
    Black
    Product Type:
    Frame & Chassis
    Height Options:
    6 Inch
    Length Options:
    11 3/4 Inch
    Rating:
    150 PSI
    Width Options:
    5 1/4 Inch
    Make:
    Universal Items
    Ready To Ship:
    Yes
    $93.99
    Qty in Cart: 0
    Price:
    $93.99
    Subtotal:
  • Wear Ring Kit Replaces KITRING3000

    Wear Ring Kit Replaces KITRING3000

    AFTERMARKET

    $271.99
    3000 Series Wear Ring KitKeep your hydraulic systems in top condition with the Wear Ring Kit Replaces KITRING3000, designed for precise performance and extended durability. Included hardware ensures...
    09-05110030
    SKU:
    09-05110030
    Product Type:
    Frame & Chassis
    Make:
    Universal Items
    $271.99
    Qty in Cart: 0
    Price:
    $271.99
    Subtotal:
  • 21 Inch Stainless Steel Blank Top Flap Accent Trim

    21 Inch Stainless Steel Blank Top Flap Accent Trim

    ROADWORKS

    $37.33
    21 Inch Blank Top Flap Accent TrimAchieve durable protection and a refined look with the 21 Inch Stainless Steel Blank Top Flap Accent Trim. Crafted from premium stainless steel and measuring 21...
    09-05070622
    SKU:
    09-05070622
    Location:
    Made In USA
    Material Options:
    Stainless Steel
    Product Type:
    Mud Flaps
    Width Options:
    21 Inch
    Make:
    Universal Items
    $37.33
    Qty in Cart: 0
    Price:
    $37.33
    Subtotal:
  • 19 Inch Stainless Steel Blank Top Flap Accent Trim

    19 Inch Stainless Steel Blank Top Flap Accent Trim

    ROADWORKS

    $36.29
    19 Inch Blank Top Flap Accent TrimUpgrade your truck's mud flaps with the 19 Inch Stainless Steel Blank Top Flap Accent Trim, crafted from premium stainless steel for exceptional durability and...
    09-05070621
    SKU:
    09-05070621
    Location:
    Made In USA
    Material Options:
    Stainless Steel
    Product Type:
    Mud Flaps
    Width Options:
    19 Inch
    Make:
    Universal Items
    $36.29
    Qty in Cart: 0
    Price:
    $36.29
    Subtotal:
  • Stainless Steel “I Love My Kids” Flap Weights

    Stainless Steel “I Love My Kids” Flap Weights

    ROADWORKS

    $71.99
    24 Inch "I Love My Kids" Flap WeightsExpress your love and personalize your truck with the Stainless Steel "I Love My Kids" Flap Weights, designed for durability and style. Made from high-quality...
    09-05070605
    SKU:
    09-05070605
    Location:
    Made In USA
    Material Options:
    Stainless Steel
    Product Type:
    Mud Flaps
    Width Options:
    24 Inch
    Make:
    Universal Items
    $71.99
    Qty in Cart: 0
    Price:
    $71.99
    Subtotal:
  • 15 Inch Stainless Steel Blank Top Flap Accent Trim

    15 Inch Stainless Steel Blank Top Flap Accent Trim

    ROADWORKS

    $33.18
    15 Inch Blank Top Flap Accent TrimStrengthen your mud flaps and elevate your truck's look with the 15 Inch Stainless Steel Blank Top Flap Accent Trim. Made from premium stainless steel, each 15-inch...
    09-05070620
    SKU:
    09-05070620
    Location:
    Made In USA
    Material Options:
    Stainless Steel
    Product Type:
    Mud Flaps
    Width Options:
    15 Inch
    Make:
    Universal Items
    $33.18
    Qty in Cart: 0
    Price:
    $33.18
    Subtotal:
  • 1/4 X 1-1/2 Inch Brass Long Nipple Replaces 3327X4, 215PNL415

    1/4 X 1-1/2 Inch Brass Long Nipple Replaces 3327X4, 215PNL415

    AUTOMANN USA

    $2.54
    1/4 X 1-1/2 Inch Brass Long NippleBuild dependable connections with the 1/4 X 1-1/2 Inch Brass Long Nipple, a premium brass fitting designed for leak-free performance. With male NPT threads on both...
    09-05040130
    SKU:
    09-05040130
    Diameter Options:
    1/4 Inch
    Length Options:
    1 1/2 Inch
    Material Options:
    Brass
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $2.54
    Qty in Cart: 0
    Price:
    $2.54
    Subtotal:
  • 1/2 X 1-1/2 Inch Brass Long Nipple Replaces 215PNL815

    1/2 X 1-1/2 Inch Brass Long Nipple Replaces 215PNL815

    AUTOMANN USA

    $3.80
    1/2 X 1-1/2 Inch Brass Long NippleDepend on the 1/2 X 1-1/2 Inch Brass Long Nipple for strong, leak-resistant pipe connections. Crafted from solid brass with male NPT threads on both ends, this...
    09-05040117
    SKU:
    09-05040117
    Diameter Options:
    1/2 Inch
    Length Options:
    1 1/2 Inch
    Material Options:
    Brass
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $3.80
    Qty in Cart: 0
    Price:
    $3.80
    Subtotal:
  • 3/16 Inch Barb X 1/8 Inch Pipe Brass Hose Fitting Replaces 10503B102

    3/16 Inch Barb X 1/8 Inch Pipe Brass Hose Fitting Replaces 10503B102

    AUTOMANN USA

    $0.91
    3/16 Inch Barb X 1/8 Inch Pipe Hose Fitting* High Quality Hose Fitting* Hose Barb To Male NPT Connection* Use With 3/16" Push-On Hose* Made Of Brass* Barb Hose End: 3/16 Inch Inner Diameter* Male NPT...
    09-05040116
    SKU:
    09-05040116
    Material Options:
    Brass
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $0.91
    Qty in Cart: 0
    Price:
    $0.91
    Subtotal:
  • 3/16 Inch Barb X 1/4 Inch Pipe Brass Hose Fitting Replaces 10503B104

    3/16 Inch Barb X 1/4 Inch Pipe Brass Hose Fitting Replaces 10503B104

    AUTOMANN USA

    $1.81
    3/16 Inch Barb X 1/4 Inch Pipe Hose Fitting* High Quality Hose Fitting* Hose Barb To Male NPT Connection* Use With 3/8" Push-On Hose* Made Of Brass* Barb Hose End: 3/8 Inch Inner Diameter* Male NPT...
    09-05040115
    SKU:
    09-05040115
    Material Options:
    Brass
    Product Type:
    Air, Electrical, & Safety
    Make:
    Universal Items
    $1.81
    Qty in Cart: 0
    Price:
    $1.81
    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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