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Mack RD Trucks

Shop for aftermarket Mack RD truck parts (1979 – 2004) to repair, replace, and refurbish your heavy-duty vocational rig. We sell replacement and aftermarket parts for popular Mack RD models, including the RD600, RD688, RD688S, RD690, and RD690S. Source collision-replacement parts, customize the exterior, or add interior cab accessories to refurbish your truck at 4 State Trucks.
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  • Price
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  • BESTfit Cummins V-Band Clamp For Cummins Replaces 10769, 323127, 50487

    BESTfit Cummins V-Band Clamp For Cummins Replaces 10769, 323127, 50487

    BESTFIT TRUCK PARTS

    $30.99
    V-Band Clamp By BESTfit Replaces 10769, 323127, 50487 Fits CumminsBuilt for strength and reliability, the BESTfit Cummins V-Band Clamp is designed to meet the demands of high-performance diesel...
    29-08090013
    SKU:
    29-08090013
    Product Type:
    Exhaust
    Style Options:
    Cummins
    Make:
    Universal Items
    $30.99
    Qty in Cart: 0
    Price:
    $30.99
    Subtotal:
  • BESTfit Detroit Diesel Water Pump For Detroit S60 14.0L Engine Replaces R23538636, E23537768, 23539199

    BESTfit Detroit Diesel Water Pump For Detroit S60 14.0L Engine Replaces R23538636, E23537768, 23539199

    BESTFIT TRUCK PARTS

    $462.99
    Water Pump By BESTfit Replaces R23538636, E23537768, 23539199 Fits Detroit S60 14.0L EngineEnhance your engine cooling system with the BESTfit Detroit Diesel Water Pump, a direct replacement for OEM...
    29-07120173
    SKU:
    29-07120173
    Style Options:
    Detroit
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $462.99
    Qty in Cart: 0
    Price:
    $462.99
    Subtotal:
  • BESTfit Cummins NOx Sensor For Cummins Replaces 2872944RX, 5EL012, S11870

    BESTfit Cummins NOx Sensor For Cummins Replaces 2872944RX, 5EL012, S11870

    BESTFIT TRUCK PARTS

    $390.99
    NOx Sensor By BESTfit Replaces 2872944RX, 5EL012, S11870 Fits CumminsUpgrade your emissions system with the BESTfit Cummins NOx Sensor, a direct replacement for OEM part numbers 2872944RX, 5EL012,...
    29-08090007
    SKU:
    29-08090007
    Style Options:
    Cummins
    Product Type:
    Exhaust
    Make:
    Universal Items
    $390.99
    Qty in Cart: 0
    Price:
    $390.99
    Subtotal:
  • BESTfit Cummins DPF For Cummins Replaces GESI0035, 6488201, 7700667

    BESTfit Cummins DPF For Cummins Replaces GESI0035, 6488201, 7700667

    BESTFIT TRUCK PARTS

    $1,551.99
    Diesel Particulate Filter By BESTfit Replaces GESI0035, 6488201, 7700667 Fits Replaces GESI0035, 6488201, 7700667Upgrade your exhaust aftertreatment system with the BESTfit Cummins Diesel Particulate...
    29-08090010
    SKU:
    29-08090010
    Product Type:
    Exhaust
    Style Options:
    Cummins
    Make:
    Universal Items
    $1,551.99
    Qty in Cart: 0
    Price:
    $1,551.99
    Subtotal:
  • BESTfit PACCAR Diesel Particulate Filter For Paccar MX Engine

    BESTfit PACCAR Diesel Particulate Filter For Paccar MX Engine

    BESTFIT TRUCK PARTS

    $2,126.99
    PACCAR Diesel Particulate Filter By BESTfit Fits Paccar MX EngineUpgrade your emissions system with the BESTfit PACCAR Diesel Particulate Filter, a direct-fit replacement for PACCAR MX engines...
    29-08090009
    SKU:
    29-08090009
    Style Options:
    Paccar
    Product Type:
    Exhaust
    Make:
    Universal Items
    $2,126.99
    Qty in Cart: 0
    Price:
    $2,126.99
    Subtotal:
  • BESTfit CAT Water Pump W/ Domed Gear Helix Teeth For Caterpillar 3406E Engine Replaces 0R8330, 1333569, 181787

    BESTfit CAT Water Pump W/ Domed Gear Helix Teeth For Caterpillar 3406E Engine Replaces 0R8330, 1333569, 181787

    BESTFIT TRUCK PARTS

    $676.99
    CAT Water Pump W/ Domed Gear Helix Teeth By BESTfit Replaces 0R8330, 1333569, 181787 Fits Caterpillar 3406E EngineEnhance your engine cooling system with the BESTfit CAT Water Pump, a direct...
    29-07120169
    SKU:
    29-07120169
    Style Options:
    Caterpillar
    Product Type:
    Engine Parts
    Make:
    Universal Items
    $676.99
    Qty in Cart: 0
    Price:
    $676.99
    Subtotal:
  • BESTfit Cummins DPF Gasket For Cummins Replaces 322989, 4329681, 5271587

    BESTfit Cummins DPF Gasket For Cummins Replaces 322989, 4329681, 5271587

    BESTFIT TRUCK PARTS

    $52.99
    Diesel Particulate Filter Gasket By BESTfit Replaces 322989, 4329681, 5271587 Fits CumminsUpgrade your exhaust system sealing with the BESTfit Cummins DPF Gasket, a direct replacement for OEM part...
    29-08090003
    SKU:
    29-08090003
    Style Options:
    Cummins
    Product Type:
    Exhaust
    Make:
    Universal Items
    $52.99
    Qty in Cart: 0
    Price:
    $52.99
    Subtotal:
  • 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 For Caterpillar 3176B, C10 & C12 Engine Replaces 1588053, 99300HD, US70

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

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

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

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

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

    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 For Caterpillar 3126 & 3116 Engine Replaces US4508, 3522150, 4346107

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

    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 For Caterpillar C13 Engine Replaces 2285811, 3764216, US952

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

    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 For Caterpillar 3126E Engine Replaces 0451056, 7016X, 3522109

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

    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 For Caterpillar 3126E, C7 & C9 Engine Replaces 2601546, 2274300, G3522080

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

    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:
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Adding your products to cart

Shop Aftermarket Mack RD Truck Parts

Working, old-school big rigs like the Mack RD series endure many years of wear and tear on jobs sites. Over time, Mack RD hardware and components experience high heat and pressure, turning mild components replacements into system-wide repairs. We stock the model-specific mechanical parts to keep your hard-working truck performing day after day:

Cosmetic Aftermarket Upgrades for Mack RD Trucks

Road debris can chip away at the headlights, fenders, mirrors, and even mud flaps over time. That’s why we stock hundreds of exterior Mack RD replacement parts to replace damaged parts. Lastly, you can find decorative custom upgrades to spruce-up the look of your rig, from interior custom dashboards to stainless steel step boxes for easy cab exit and entry.

Frequently Asked Questions About Mack RD Truck Parts

What years and models of Mack RD trucks do your parts fit?

Our Mack RD parts are designed to fit RD600, RD688, and RD690 models manufactured from 1979 through 2004. However, compatibility can vary based on specific configurations and factory options. We recommend checking your OEM or contacting our team with your truck's model year and any special equipment codes to ensure proper fitment before ordering.

Are your Mack RD bumpers made from chrome-plated steel or stainless steel?

We offer both options depending on your needs and budget. Our chrome-plated steel bumpers feature a triple-chrome plating process over heavy-gauge steel for durability and shine. Our stainless steel options are typically 304-grade stainless with a mirror polish finish. Chrome bumpers are more affordable but require regular maintenance, while stainless steel resists corrosion better in harsh conditions but comes at a higher price point.

Do I need special tools or professional installation for Mack RD bumpers?

Most Mack RD bumper installations can be completed with standard shop tools including socket sets, wrenches, and a drill for any additional mounting holes. The bumpers typically weigh between 80-150 pounds, so having a helper or hoist is strongly recommended. Installation usually takes 2-4 hours. Some aftermarket bumpers may require minor modifications to mounting brackets or drilling new holes. Professional installation is recommended if you're not comfortable with heavy lifting or drilling.

What's the difference between OEM-style and aftermarket Mack RD parts?

OEM-style parts are manufactured to match original factory specifications for direct bolt-on replacement. Aftermarket parts may offer enhanced features like additional gauge holes, different styling, or heavier construction but might require modifications during installation. OEM-style parts typically maintain factory warranty compliance, while aftermarket options often provide better value and customization options. Both meet DOT standards when applicable.

How do I maintain chrome parts on my Mack RD to prevent rust and pitting?

Chrome parts require regular maintenance to maintain their appearance, especially in regions using road salt. Wash chrome surfaces weekly with mild soap and water, then dry thoroughly. Apply a quality chrome polish monthly and use a chrome sealant every 3-4 months for added protection. Avoid abrasive cleaners or steel wool which can scratch the chrome. For winter storage or harsh conditions, consider applying a thin coat of WD-40 or similar protectant, then remove before regular use.


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