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Freightliner FLC112 Deck Plates & Air Line Boxes

We offer Freightliner FLC112 deck plates and airline boxes in both diamond tread and smooth finishes. Choose between flush mount and hidden mount options, and find air line boxes with single or multiple connector holes. Installation is easy with anti-slide brackets and patented mounting clips, ensuring a secure and stable fit. Shop now at 4 State Trucks!
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  • FREE SHIPPING
    CSM Stainless Steel Surface-Mount Air Line Box

    CSM Stainless Steel Surface-Mount Air Line Box

    CHROME SHOP MAFIA

    $320.99 - $401.99
    Revamp your rig with the CSM Stainless Steel Surface Mount Air Line Box, an essential component for truck owners seeking to streamline their air line and electrical connections. Made from durable 304...
    PPR_202176
    SKU:
    PPR_202176
    Length Options:
    32 Inch
    Truck Class:
    Universal
    Location:
    Made In USA
    Style Options:
    Surface Mount
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Truck Class:
    Heavy Duty
    Ready To Ship:
    Yes
    Product Type:
    Air, Electrical, & Safety
    $320.99 - $401.99
    Qty in Cart: 0
    Price:
    $320.99 - $401.99
    Subtotal:
  • FREE SHIPPING
    CSM Stainless Steel Trough Style Flush-Mount Air Line Box

    CSM Stainless Steel Trough Style Flush-Mount Air Line Box

    CHROME SHOP MAFIA

    $303.99 - $337.99
    The Stainless Steel Trough Style Flush Mount Air Line Box is a must-have to organize air lines and electrical connections efficiently. Constructed from durable 304 stainless steel, this air line box...
    PPR_202175
    SKU:
    PPR_202175
    Truck Class:
    Universal
    Location:
    Made In USA
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Style Options:
    Flush Mount
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $303.99 - $337.99
    Qty in Cart: 0
    Price:
    $303.99 - $337.99
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  • On Sale
    Limited Quantity Available
    Stainless Steel In-Frame Deck Plate For Trucks W/ 27 Inches Between Frame Rails

    Stainless Steel In-Frame Deck Plate For Trucks W/ 27 Inches Between Frame Rails

    IOWA CUSTOMS

    $398.69 - $855.89
    Optimize your setup with the Stainless Steel Flush Mount In-Frame Deck Plate, a stellar upgrade for truck owners looking for both functionality and style. Made from #8 304 polished stainless steel,...
    PPR_202165
    SKU:
    PPR_202165
    Truck Class:
    Universal
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    Length Options:
    36 Inch
    Length Options:
    84 Inch
    Type Options:
    Flush Mount
    Length Options:
    60 Inch
    Finish Options:
    Polished
    Location:
    Made In USA
    Length Options:
    72 Inch
    Style Options:
    In Frame
    Width Options:
    27 Inch
    Length Options:
    48 Inch
    Length Options:
    96 Inch
    $398.69 - $855.89
    Qty in Cart: 0
    Price:
    $398.69 - $855.89
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  • Smooth Aluminum In-Frame Deck Plate Flush Mount

    Smooth Aluminum In-Frame Deck Plate Flush Mount

    IOWA CUSTOMS

    $363.99 - $794.99
    Improve your ride with the Smooth Aluminum Flush Mount In-Frame Deck Plate which offers exceptional durability and a polished look. Crafted from high-quality aluminum, this deck plate is designed to...
    PPR_202164
    SKU:
    PPR_202164
    Truck Class:
    Universal
    Material Options:
    Aluminum
    Make:
    Universal Items
    Finish Options:
    Smooth
    Style Options:
    Flush Mount
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $363.99 - $794.99
    Qty in Cart: 0
    Price:
    $363.99 - $794.99
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  • Diamond Plate Aluminum In-Frame Deck Plate Flush-Mount

    Diamond Plate Aluminum In-Frame Deck Plate Flush-Mount

    IOWA CUSTOMS

    $498.99 - $1,129.99
    Upgrade your look with the Diamond Plate Aluminum Flush Mount In-Frame Deck Plate, a robust accessory designed for adding more shine. Made from high-strength diamond tread aluminum, this deck plate...
    PPR_202163
    SKU:
    PPR_202163
    Truck Class:
    Universal
    Material Options:
    Aluminum
    Make:
    Universal Items
    Finish Options:
    Diamond Plate
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    $498.99 - $1,129.99
    Qty in Cart: 0
    Price:
    $498.99 - $1,129.99
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  • FREE SHIPPING OVER $249
    CSM 34 Inch Stainless Steel Deck Plates With Length Options

    CSM 34 Inch Stainless Steel Deck Plates With Length Options

    CHROME SHOP MAFIA

    $225.99 - $1,044.99
    The CSM 34 Inch Wide Stainless Steel Deck Plate is made from high-quality 304 stainless steel, and available in various lengths ranging from 2 feet to 10 feet. Each deck plate comes complete with...
    PPR_202162
    SKU:
    PPR_202162
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $225.99 - $1,044.99
    Qty in Cart: 0
    Price:
    $225.99 - $1,044.99
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  • CSM 34 Inch Wide Diamond Plate Aluminum Deck Plates

    CSM 34 Inch Wide Diamond Plate Aluminum Deck Plates

    CHROME SHOP MAFIA

    $181.99 - $819.99
    Add dependable footing and bold styling to your truck with the CSM 34 Inch Wide Diamond Plate Aluminum Deck Plate. Built from durable aluminum with a raised diamond tread pattern, it provides...
    PPR_202161
    SKU:
    PPR_202161
    Truck Class:
    Heavy Duty
    Location:
    Made In USA
    Material Options:
    Aluminum
    Make:
    Universal Items
    Finish Options:
    Diamond Plate
    Style Options:
    Surface Mount
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    Width Options:
    34 Inch
    Length Options:
    48 Inch
    $181.99 - $819.99
    Qty in Cart: 0
    Price:
    $181.99 - $819.99
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  • Merritt Aluminum Dyna Deck Top Mount Deck Plate 33.25 Inch Wide W/ Height Options

    Merritt Aluminum Dyna Deck Top Mount Deck Plate 33.25 Inch Wide W/ Height Options

    MERRITT

    $221.99 - $644.99
    For truck owners seeking strength, style, and utility, the Merritt 33.25 Inch Wide Aluminum Dyna Deck Top Mount Deck Plate delivers unmatched performance. Made from premium aluminum, it provides a...
    PPR_201929
    SKU:
    PPR_201929
    Truck Class:
    Universal
    Location:
    Made In USA
    Material Options:
    Aluminum
    Make:
    Universal Items
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    Length Options:
    28 Inch
    Width Options:
    33 Inch
    Length Options:
    47 Inch
    Length Options:
    18 1/2 Inch
    Length Options:
    65 Inch
    Length Options:
    37 1/2 Inch
    Position:
    Kit Full
    Type Options:
    Top Mount
    Style Options:
    Ribbed
    $221.99 - $644.99
    Qty in Cart: 0
    Price:
    $221.99 - $644.99
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  • Merritt 30.25 Inch Aluminum Flush Mount Dyna Deck Plate

    Merritt 30.25 Inch Aluminum Flush Mount Dyna Deck Plate

    MERRITT

    $227.99 - $753.99
    Upgrade your truck bed or trailer with the Merritt 30.25 Inch Aluminum Flush Mount Dyna Deck Plate. Available in multiple sizes-18.5 x 30.25, 28 x 30.25, 37.5 x 30.25, 56 x 30.25, and 65.25 x 30.25...
    PPR_201926
    SKU:
    PPR_201926
    Location:
    Made In USA
    Truck Class:
    Universal
    Material Options:
    Aluminum
    Make:
    Universal Items
    Style Options:
    Flush Mount
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    Length Options:
    46 Inch
    Ready To Ship:
    Yes
    Length Options:
    56 Inch
    Length Options:
    18 1/2 Inch
    Length Options:
    28 Inch
    Length Options:
    65 Inch
    Width Options:
    30 Inch
    Length Options:
    37 1/2 Inch
    Type Options:
    Flush Mount
    Length Options:
    74 Inch
    $227.99 - $753.99
    Qty in Cart: 0
    Price:
    $227.99 - $753.99
    Subtotal:
  • On Sale
    FREE SHIPPING OVER $249
    Limited Quantity Available
    S2 Style Billet Aluminum Step Plate W/ Flat Ends For Side Boxes And Deck Plates

    S2 Style Billet Aluminum Step Plate W/ Flat Ends For Side Boxes And Deck Plates

    IOWA CUSTOMS

    $75.23 - $503.99
    The Billet Aluminum Step Plate in the S2 style with flat ends is a high-quality option specifically designed for side boxes and deck plates. Measuring 6 inches in width and 12 or 20 inches in length,...
    PPR_201332
    SKU:
    PPR_201332
    Truck Class:
    Universal
    Material Options:
    Aluminum
    Make:
    Universal Items
    Truck Class:
    Heavy Duty
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $75.23 - $503.99
    Qty in Cart: 0
    Price:
    $75.23 - $503.99
    Subtotal:
  • FREE SHIPPING OVER $249
    S1 Style Billet Aluminum Step Plate With Concave Ends For Side Boxes & Deck Plates

    S1 Style Billet Aluminum Step Plate With Concave Ends For Side Boxes & Deck Plates

    IOWA CUSTOMS

    $152.99 - $483.99
    Maximize your truck with the S1 Style Billet Aluminum Step Plate with Concave Ends, an ideal accessory crafted for both functionality and aesthetics. This step plate measures 6 inches in width and 20...
    PPR_201146
    SKU:
    PPR_201146
    Truck Class:
    Universal
    Material Options:
    Aluminum
    Make:
    Universal Items
    Truck Class:
    Heavy Duty
    Ready To Ship:
    Yes
    Product Type:
    Frame & Chassis
    $152.99 - $483.99
    Qty in Cart: 0
    Price:
    $152.99 - $483.99
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  • 10 Foot Deck Plate, Flush Mount. Modular Style With 13 Planks.

    10 Foot Deck Plate, Flush Mount. Modular Style With 13 Planks.

    MERRITT

    $1,181.99
    10 Foot Deck Plate, Flush Mount. Modular Style With 13 Planks* High Quality Deck Plate* 10 Foot* Flush Mount * Modular Style* With 13 Planks* Made In USA* Sold Individually* Warranty On Deck Plates...
    4413
    SKU:
    4413
    Length Options:
    120 Inch
    Truck Class:
    Heavy Duty
    Location:
    Made In USA
    Style Options:
    Flush Mount
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $1,181.99
    Qty in Cart: 0
    Price:
    $1,181.99
    Subtotal:
  • Merritt 30.25 X 92.5 Inch Dyna Deck Plate- Flush Mount

    Merritt 30.25 X 92.5 Inch Dyna Deck Plate- Flush Mount

    MERRITT

    $964.99
    30.25 X 92.5 Inch Flush Mount Deck Plate By MerrittThe Merritt 30.25 92.5 Inch Dyna Deck Plate - Flush Mount is engineered to deliver maximum functionality and durability for any truck bed. Its flush...
    4410
    SKU:
    4410
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Style Options:
    Flush Mount
    Material Options:
    Aluminum
    Make:
    Universal Items
    Length Options:
    92 Inch
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $964.99
    Qty in Cart: 0
    Price:
    $964.99
    Subtotal:
  • Dyna-Deck Top Mount Modular Deck Cover, 56 L X 33.25 W IN

    Dyna-Deck Top Mount Modular Deck Cover, 56 L X 33.25 W IN

    MERRITT

    $541.99
    56 L X 33.25 W Inch Deck Plate W/ Slide Together Planks* High Quality Deck Plate* Dimensions:   - 56 Length   - 33.25 Width* With Top Mount With Easy Slide Together Planks* Has Non Skid Ribbed Deck...
    436
    SKU:
    436
    Location:
    Made In USA
    Truck Class:
    Heavy Duty
    Length Options:
    56 Inch
    Material Options:
    Aluminum
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $541.99
    Qty in Cart: 0
    Price:
    $541.99
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  • Recessed Air Line Box Stainless Steel W/ Holes For Electric & 2 Air Hook Ups

    Recessed Air Line Box Stainless Steel W/ Holes For Electric & 2 Air Hook Ups

    IOWA CUSTOMS

    $608.99
    Air Line Box* High Quality Recessed Air Line Box* Made Of Stainless Steel * With Openings for 1 Electric And 2 Air Hook Up* Sold Individually* Warranty On Recessed Air Line Box Against Defects In...
    09-0504318
    SKU:
    09-0504318
    Truck Class:
    Universal
    Make:
    Universal Items
    Material Options:
    Stainless Steel
    Style Options:
    Flush Mount
    Product Type:
    Frame & Chassis
    $608.99
    Qty in Cart: 0
    Price:
    $608.99
    Subtotal:
  • FREE SHIPPING
    Trough Style Air Line Box Stainless Steel By Brunner

    Trough Style Air Line Box Stainless Steel By Brunner

    BRUNNER FABRICATION

    $618.99
    20.25 X 15 Inch Trough Style Air Line Box By Brunner FabricationProtect the air line connection on your truck with this high quality trough style airline box by Brunners Fabrication Inc. It is made...
    09-0504310
    SKU:
    09-0504310
    Length Options:
    20 Inch
    Truck Class:
    Universal
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Style Options:
    Surface Mount
    Product Type:
    Air, Electrical, & Safety
    $618.99
    Qty in Cart: 0
    Price:
    $618.99
    Subtotal:
  • Stainless Steel Airline Box W/ 2 Electric Plug Holes & Bolted In Ends

    Stainless Steel Airline Box W/ 2 Electric Plug Holes & Bolted In Ends

    PHOENIX DESIGN

    $291.99
    SS Air Line Box W/ 2 Electric Plug Holes & Bolted In EndsThis air-line box uses strong 304 stainless steel to keep your electrical connections safe. It includes two handy electrical plug holes with...
    09-0504308
    SKU:
    09-0504308
    Truck Class:
    Universal
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $291.99
    Qty in Cart: 0
    Price:
    $291.99
    Subtotal:
  • Air Line Box Stainless Steel 32 Inch W/ Hole For Single Electric Plug- Bolted In Ends

    Air Line Box Stainless Steel 32 Inch W/ Hole For Single Electric Plug- Bolted In Ends

    PHOENIX DESIGN

    $277.99
    Airline Box W/ Single Electric PlugCrafted from stainless steel, the Air Line Box incorporates two cutouts for air lines. For increased durability and security, its ends are bolted. The overall...
    09-0504307
    SKU:
    09-0504307
    Truck Class:
    Universal
    Length Options:
    32 Inch
    Style Options:
    Surface Mount
    Material Options:
    Stainless Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $277.99
    Qty in Cart: 0
    Price:
    $277.99
    Subtotal:
  • FREE SHIPPING
    Air Line Box Diamond Plate Aluminum W/ Single Electrical Plug Hole by CSM

    Air Line Box Diamond Plate Aluminum W/ Single Electrical Plug Hole by CSM

    CHROME SHOP MAFIA

    $454.99
    Aluminum Air Line Box w/ Single Electrical Plug Hole By Chrome Shop MafiaHide unsightly connectors on the back of your truck with this CSM Air Line Box. Made of lightweight aluminum with diamond...
    09-0504200
    SKU:
    09-0504200
    Truck Class:
    Universal
    Location:
    Made In USA
    Material Options:
    Aluminum
    Make:
    Universal Items
    Finish Options:
    Diamond Plate
    Style Options:
    Surface Mount
    Product Type:
    Frame & Chassis
    $454.99
    Qty in Cart: 0
    Price:
    $454.99
    Subtotal:
  • Smooth Aluminum Recessed Air Line Box With Holes For 7-Way Plug, Air Lines

    Smooth Aluminum Recessed Air Line Box With Holes For 7-Way Plug, Air Lines

    IOWA CUSTOMS

    $590.99
    Smooth Aluminum Recessed Air Line BoxThis quality Series 7 Iowa Customs recessed air line box fits most trucks. It is made of lightweight smooth aluminum and has pre-cut openings for trailer air...
    09-0504103
    SKU:
    09-0504103
    Truck Class:
    Universal
    Finish Options:
    Smooth
    Make:
    Universal Items
    Style Options:
    Flush Mount
    Material Options:
    Aluminum
    Product Type:
    Frame & Chassis
    $590.99
    Qty in Cart: 0
    Price:
    $590.99
    Subtotal:
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Adding your products to cart

This product lineup features a comprehensive selection of high-quality deck plates, air line boxes, and related accessories designed for Freightliner FLC112 semi-trucks. Whether you need a sturdy stainless steel or durable aluminum deck plate, a sleek sectionalized air line box, or versatile filler panels, you'll find it all here.

Upgrade Your Catwalk & Air Line Box

The deck plates come in a variety of sizes and finishes, including diamond tread, smooth, and embossed for added grip. Many feature cutouts and openings for trailer air, electrical, and hydraulic hookups, making customization and organization a breeze. The air line boxes offer similar flexibility, with models available in stainless steel, aluminum, and trough styles to suit your needs. Beyond the basics, you'll also find handy accessories like license plate holders, steps, and storage boxes to enhance both the functionality and appearance of your FLC112. Crafted with premium materials and thoughtful design, these products are built to withstand the rigors of the road while keeping your truck looking its best. You can pair your upgrade with related products like: Freightliner FLC112 frame light bar panels, Freightliner FLC112 fuel tank wraps, and Freightliner FLC112 frame step panels. Whether you're doing a full overhaul or just need to replace a few key components, this product lineup has everything you need to keep your Freightliner FLC112 in top shape. Upgrade your rig with high-quality, durable parts that will serve you for miles to come.

Frequently Asked Questions About Freightliner FLC112 Deck Plates & Air Line Boxes

What are deck plates and air line boxes used for on the FLC112?

Deck plates provide a durable mounting surface behind the cab where air lines, electrical lines, and gladhands connect to the trailer, while air line boxes house and protect the air and electrical connections in that same area. Together they help organize and shield these critical hookups from road debris, moisture, and general wear.

Will these parts fit my Freightliner FLC112 without modification?

Products listed in this category are designed to match the factory fitment for the FLC112, but slight variations can occur between production years or if your truck has aftermarket modifications. We recommend comparing measurements and mounting hole patterns to your existing deck plate or air line box before ordering to confirm a proper fit.

What materials are these deck plates and air line boxes made from?

Most deck plates and air line boxes are constructed from steel or aluminum for durability and corrosion resistance. Steel components typically offer added strength, while aluminum options provide a lighter weight alternative with good resistance to rust. Check the specific product listing for the exact material used.

Do these parts come pre-drilled or finished, or will I need to do additional prep work?

Many deck plates and air line boxes come pre-drilled to match factory mounting patterns, but this can vary by manufacturer and part number. Some parts may be sold in raw or primed finish and require painting to match your truck, while others may come with a finished coating. Always check the product description for finish and drilling details before purchase.

How difficult is it to install a replacement deck plate or air line box?

Installation difficulty depends on the specific part and the condition of your truck's existing mounting points. In general, replacing a deck plate or air line box involves removing the old unit, transferring or reconnecting air lines and electrical connections, and securing the new part in place with bolts or fasteners. Having basic hand tools and a service manual on hand can make the process smoother, and a qualified technician can help if you are unfamiliar with air line and electrical routing.


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