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Freightliner FLC120 Engine & Performance Parts

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  • Price
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  • Bully Dog 6 Pin Diagnostic Plug

    Bully Dog 6 Pin Diagnostic Plug

    BULLY DOG

    $63.49
    Replacement Diagnostic Plug For Bully Dog DevicesIf you lost or damaged your 6 pin diagnostic plug, 4 State Trucks has you covered. This high quality replacement part will get your Bully Dog device...
    09-070400003
    SKU:
    09-070400003
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $63.49
    Qty in Cart: 0
    Price:
    $63.49
    Subtotal:
  • FREE SHIPPING
    Diesel Fuel Pump System, 250 GPH Industrial Series By FASS

    Diesel Fuel Pump System, 250 GPH Industrial Series By FASS

    FASS

    $934.99
    FASS IND 250G Diesel Fuel Pump SystemFASS Fuel Systems has engineered the top-performing Industrial Series Diesel Fuel System right here in the U.S.A. With advanced 2 Micron filtration, built-in...
    09-07030162
    SKU:
    09-07030162
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Engine Parts
    Ready To Ship:
    Yes
    $934.99
    Qty in Cart: 0
    Price:
    $934.99
    Subtotal:
  • FASS 165 GPH Industrial Series Diesel Fuel Pump System

    FASS 165 GPH Industrial Series Diesel Fuel Pump System

    FASS

    $980.99
    FASS IND 165G Diesel Fuel Pump System* High Quality Fuel System* Ind165G Series FASS* Featuring: - Revolutionary Whisper Technology - 165 Gallons Per Minute At 16-18 PSI* Recommended For 400 - 590...
    09-07030161
    SKU:
    09-07030161
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $980.99
    Qty in Cart: 0
    Price:
    $980.99
    Subtotal:
  • FREE SHIPPING OVER $249
    FASS Fuel System Mounting Bracket - Eliminates Frame Drilling

    FASS Fuel System Mounting Bracket - Eliminates Frame Drilling

    FASS

    $161.99
    FASS Fuel System Mounting Bracket* High Quality Bracket* Eliminates Frame Drilling* Fits Frame Heights From 10 Inch To 11.75 Inch* Designed To Fit Securely Around The Frame* Sold Individually* Made...
    09-07030153
    SKU:
    09-07030153
    Truck Class:
    Heavy Duty
    Location:
    Made In USA
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $161.99
    Qty in Cart: 0
    Price:
    $161.99
    Subtotal:
  • Electric Diesel Fuel Heater Kit For FASS System Titanium Series

    Electric Diesel Fuel Heater Kit For FASS System Titanium Series

    FASS

    $207.99
    Titanium Series Optional Electric Diesel Fuel Heater KitUpgrade your FASS System for extreme cold with the Titanium Series Electric Heater Kits. These heaters prevent gelling, aid cold weather...
    09-07030148
    SKU:
    09-07030148
    Truck Class:
    Universal
    Location:
    Made In USA
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $207.99
    Qty in Cart: 0
    Price:
    $207.99
    Subtotal:
  • Mounting Package For Fuel Pump W/ 140. 240. 250.260 Or 290 GPH Flow Rating

    Mounting Package For Fuel Pump W/ 140. 240. 250.260 Or 290 GPH Flow Rating

    FASS

    $48.43
    Mounting Package For Fuel Pump W/ 140. 240. 250.260 Or 290 GPH Flow Rating* High Quality Mounting Package* For Fuel Pumps With 140, 240, 250, 260, Or 290 Gallons Per Hour Flow Rating* Universal In...
    09-07030011
    SKU:
    09-07030011
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $48.43
    Qty in Cart: 0
    Price:
    $48.43
    Subtotal:
  • Mounting Package For Fuel Pump W/ 100 Or 165 GPH Flow Rating For Class 8 Applications

    Mounting Package For Fuel Pump W/ 100 Or 165 GPH Flow Rating For Class 8 Applications

    FASS

    $50.99
    Mounting Package For Fuel Pump W/ 100 Or 165 GPH Flow Rating* High Quality Mounting Package* For Fuel Pumps With 100 Or 165 Gallons Per Hour Flow Rating* Made In The USA* Sold Individually* Warranty...
    09-07030010
    SKU:
    09-07030010
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $50.99
    Qty in Cart: 0
    Price:
    $50.99
    Subtotal:
  • FASS Fuel Systems Fuel System Mounting For Class 8 Trucks Titanium Universal High Pressure

    FASS Fuel Systems Fuel System Mounting For Class 8 Trucks Titanium Universal High Pressure

    FASS

    $50.99
    Mounting Package For Fuel Pumps Fits Class 8 TrucksFASS fuel system mounting packages make installing your new FASS fuel pump quick and easy. These mounts feature durable construction and come with...
    09-07030009
    SKU:
    09-07030009
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $50.99
    Qty in Cart: 0
    Price:
    $50.99
    Subtotal:
  • Mounting Package For Fuel Pump W/ 95 Or 165 GPH Flow Rating For Class 8 Applications

    Mounting Package For Fuel Pump W/ 95 Or 165 GPH Flow Rating For Class 8 Applications

    FASS

    $40.79
    Mounting Package For Fuel Pump W/ 95 Or 165 GPH Flow Rating* High Quality Mounting Package* For Fuel Pump For Class 8 Trucks* For Fuel Pumps With 95 Or 165 Gallons Per Hour Flow Rating* Made In The...
    09-07030008
    SKU:
    09-07030008
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $40.79
    Qty in Cart: 0
    Price:
    $40.79
    Subtotal:
  • FASS Industrial Series Diesel 260 GPH Fuel System, Class 8

    FASS Industrial Series Diesel 260 GPH Fuel System, Class 8

    FASS

    $1,135.99
    260 GPH Fuel System* High Quality Diesel Fuel System* Aluminum Housing* Fass Air Separation Port Ties Into OEM Engine Fuel Return* Preset 16 PSI Fuel Pressure* 260 Gallons Per Hour Flow Rating*...
    09-07030007
    SKU:
    09-07030007
    Truck Class:
    Universal
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $1,135.99
    Qty in Cart: 0
    Price:
    $1,135.99
    Subtotal:
  • FASS Industrial Series Diesel 240 GPH Fuel System, Class 8

    FASS Industrial Series Diesel 240 GPH Fuel System, Class 8

    FASS

    $891.99
    240 GPH Fuel SystemThis Industrial Series Diesel Fuel System delivers 240 gallons per hour and connects seamlessly to your OEM engine fuel return, no extra fuel line needed. With a 16 PSI preset...
    09-07030006
    SKU:
    09-07030006
    Truck Class:
    Universal
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $891.99
    Qty in Cart: 0
    Price:
    $891.99
    Subtotal:
  • FASS Industrial Series Diesel 140 GPH Fuel System, Class 8

    FASS Industrial Series Diesel 140 GPH Fuel System, Class 8

    FASS

    $1,032.99
    140 GPH Fuel System* High Quality Diesel Fuel System* Aluminum Housing* Fass Air Separation Port Ties Into OEM Engine Fuel Return* Preset 16 PSI Fuel Pressure* 140 Gallons Per Hour Flow Rating*...
    09-07030005
    SKU:
    09-07030005
    Truck Class:
    Universal
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $1,032.99
    Qty in Cart: 0
    Price:
    $1,032.99
    Subtotal:
  • FASS Industrial Series Diesel 100 GPH Fuel System For Class 8 UIM Engines

    FASS Industrial Series Diesel 100 GPH Fuel System For Class 8 UIM Engines

    FASS

    $789.99
    100 GPH Fuel System Fits Class 8 UIM Engines* High Quality Diesel Fuel System* Aluminum Housing* Fass Air Separation Port Ties Into OEM Engine Fuel Return* Preset 16 PSI Fuel Pressure * 100 Gallons...
    09-07030003
    SKU:
    09-07030003
    Truck Class:
    Universal
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $789.99
    Qty in Cart: 0
    Price:
    $789.99
    Subtotal:
  • FASS Industrial Series Diesel 290 GPH Fuel System, Class 8 For Cummins, Cat, Detroit Diesel Trucks

    FASS Industrial Series Diesel 290 GPH Fuel System, Class 8 For Cummins, Cat, Detroit Diesel Trucks

    FASS

    $1,096.99
    290 GPH Fuel System, Class 8 Fits Cummins, Cat, Detroit Diesel Trucks* High Quality Diesel Fuel System* Aluminum Housing* 8 Fass Air Separation Port Ties Into OEM Engine Fuel Return* Preset 16 PSI...
    09-07030002
    SKU:
    09-07030002
    Truck Class:
    Universal
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Engine Parts
    $1,096.99
    Qty in Cart: 0
    Price:
    $1,096.99
    Subtotal:
  • Total: items /

Adding your products to cart

Freightliner FLC120 Engine & Performance Parts: Unlock power and efficiency for your Freightliner FLC120 with our wide selection of engine and performance upgrades. From fuel systems and turbochargers to exhaust parts and more, we've got the components you need to improve fuel economy, boost horsepower, and unleash the full potential of your Class 8 Freightliner. Whether you're hauling heavy loads or looking to enhance your truck's performance, our premium parts and accessories are designed to deliver outstanding results. Upgrade your FLC120 today and experience the difference in power, responsiveness, and overall driving experience.

Frequently Asked Questions About Freightliner FLC120 Engine & Performance Parts

Will these engine and performance parts fit my specific FLC120 model year and engine setup?

The Freightliner FLC120 was produced over many model years and was offered with different engine options, so fitment can vary significantly from one truck to another. Before ordering, check the part description for listed year ranges and engine compatibility, and have your engine make and model on hand (such as Detroit Diesel, Cummins, or Caterpillar) to confirm the part matches your specific configuration. If you are unsure, our team can help verify fitment using your VIN or engine serial number.

Are these parts OEM, aftermarket, or reconditioned?

This category includes a mix of OEM, aftermarket, and reconditioned components depending on the specific item. Each product listing notes whether the part is new OEM, new aftermarket, or a quality reconditioned unit, so you can choose based on your budget and preference. If a listing does not clearly state the part's origin, reach out to us for clarification before purchasing.

What materials and construction can I expect from these components?

Engine and performance parts in this category are typically made from durable materials such as cast iron, aluminum, or steel, depending on the part's function and the demands it needs to withstand. We aim to source components built to hold up under regular commercial use, and material details are included in individual product descriptions when relevant.

Do I need professional installation, or can I install these parts myself?

Installation complexity varies widely across this category. Smaller components like sensors, gaskets, or filters may be manageable for an experienced DIY mechanic with the right tools, while larger performance parts such as turbochargers, exhaust components, or engine accessories often require professional installation and specialized equipment. If you're unsure about the difficulty level for a specific part, check the product notes or contact our team for guidance.

How do I know if a part will improve performance versus just replacing a worn component?

Some items in this category are direct replacement parts designed to restore your engine to factory specifications, while others are performance-oriented upgrades intended to enhance power, efficiency, or durability beyond stock levels. Product titles and descriptions typically indicate which category a part falls into, so review this information carefully to match the part to your goals, whether that's routine maintenance or a performance upgrade.


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