null
Chrome Rush countdown – 14% off semi truck parts and chrome accessories at 4 State Trucks
Chrome Rush countdown – 14% off semi truck parts and chrome accessories at 4 State Trucks

Peterbilt 388 Frame Crossmembers & Covers

  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • Flange Bolt 5/16 - 18 X 1/2 Inch Grade 8

    Flange Bolt 5/16 - 18 X 1/2 Inch Grade 8

    AUTOMANN USA

    $1.15
    Grade 8 Flange Bolt Replaces 3512558C1, W300602* High Quality Flange Bolt* 5/16 Inch X 1/2 Inch * Sold Individually * Warranty On Flange Bolts Against Defects In Workmanship & Material From Date Of...
    29-05250010
    SKU:
    29-05250010
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $1.15
    Qty in Cart: 0
    Price:
    $1.15
    Subtotal:
  • Hex Head Flange Bolt 5/8-18 X 1-1/2 Inch Grade 8

    Hex Head Flange Bolt 5/8-18 X 1-1/2 Inch Grade 8

    AUTOMANN USA

    $2.31
    Grade 8 Hex Head Flange Bolt W/ Fine Pitch Replaces 23-11015-150 And 414076C1* High Quality Flange Bolt* Dimensions: - 5/8 Inch Bolt Diameter - 1-1/2 Inch Bolt Length* Bolt Type- Flanged Bolt*...
    29-05250009
    SKU:
    29-05250009
    Material Options:
    Steel
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $2.31
    Qty in Cart: 0
    Price:
    $2.31
    Subtotal:
  • Poly Torque Arm Service Repair Kit - LWSL1100, SL11LW For Watson & Chalin

    Poly Torque Arm Service Repair Kit - LWSL1100, SL11LW For Watson & Chalin

    AFTERMARKET

    $398.99
    Poly Service Repair Kit Replaces LWSL1100, SL11LW* High Quality Service Repair Kit* Consists Of  - (4) Torque Arm - (2) Axle Connect Bushing - (2) Pivot Bushing - (8) U-Bolt Washer - (2) Spring...
    29-05100150
    SKU:
    29-05100150
    Material Options:
    Plastic/Poly
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $398.99
    Qty in Cart: 0
    Price:
    $398.99
    Subtotal:
  • Equalizer Thrust Washer 5.75 OD X 3.50 ID - 32365000 For Hendrickson

    Equalizer Thrust Washer 5.75 OD X 3.50 ID - 32365000 For Hendrickson

    BESTFIT TRUCK PARTS

    $4.64
    0.125 Inch Thick Equalizer Thrust Washer Replaces 48100123, SRK79* High Quality Washer* 5.75 Inch OD * 3.50 Inch ID * 0.125 Inch Thickness* Sold Individually * Warranty On Washers Against Defects In...
    29-05100090
    SKU:
    29-05100090
    Diameter Options:
    3 1/2 Inch
    Material Options:
    Steel
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $4.64
    Qty in Cart: 0
    Price:
    $4.64
    Subtotal:
  • Transverse Beam Stud Kit 48100161 E-4401A For SAF Holland / Neway

    Transverse Beam Stud Kit 48100161 E-4401A For SAF Holland / Neway

    AFTERMARKET

    $218.99
    Transverse Beam End Rebushing Kit Replaces E4401A, R304401A, 48100161, And SRK771* High Quality Service Kit* Consists Of  - (4) Beam Bushing - (2) Spacer Washer - (2) U-Bolt Washer - (2) 1 1/4 Inch...
    29-05100087
    SKU:
    29-05100087
    Material Options:
    Steel
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $218.99
    Qty in Cart: 0
    Price:
    $218.99
    Subtotal:
  • Pivot Connection Align Service Repair Kit For Neway

    Pivot Connection Align Service Repair Kit For Neway

    AFTERMARKET

    $129.99
    Pivot Connection Align Service Repair Kit Replaces 48100205, SRK148* High Quality Service Repair Kit* Consists Of  - (2) 1-1/8 Inch x 9-1/2 Inch Cap Screw  - (2) 1-1/8 Inch Lock Nut  - (2) Pivot...
    29-05100009
    SKU:
    29-05100009
    Material Options:
    Steel
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    Make:
    Trailer
    $129.99
    Qty in Cart: 0
    Price:
    $129.99
    Subtotal:
  • Poly V-Rod Rebush Kit For Neway

    Poly V-Rod Rebush Kit For Neway

    AFTERMARKET

    $366.99
    Poly V-Rod Rebush Kit* High Quality V-Rod Rebush Kit* Consists Of  - (2) Torque Rod Bushing Poly Premium - (1) Apex Bushing  - (2) Spacer Washer  - (2) 1 Inch U-Bolt Washer  - (1) 1 Inch Lock Nut  -...
    29-05100031
    SKU:
    29-05100031
    Truck Class:
    Heavy Duty
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    Make:
    Trailer
    $366.99
    Qty in Cart: 0
    Price:
    $366.99
    Subtotal:
  • Pivot Connection Align Kit - SRK147 For Neway

    Pivot Connection Align Kit - SRK147 For Neway

    AFTERMARKET

    $258.99
    Pivot Connection Align Kit Replaces 48100204, SRK147* High Quality Pivot Connection Kit* Consists Of  - (2) Pivot Bushing  - (4) Alignment Collar  - (2) 1-1/8 Inch X 9-1/2 Inch Cap Screw  - (2) 1-1/8...
    29-05100008
    SKU:
    29-05100008
    Truck Class:
    Heavy Duty
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    Make:
    Trailer
    $258.99
    Qty in Cart: 0
    Price:
    $258.99
    Subtotal:
  • BESTfit Bushing Kit W/ 4 Rubber Shackles & Shock Bushings For EB2 Type Ends

    BESTfit Bushing Kit W/ 4 Rubber Shackles & Shock Bushings For EB2 Type Ends

    BESTFIT TRUCK PARTS

    $16.51
    BESTfit Rubber Bushing Kit Replaces 140149, 8057131Keep your truck's shocks and shackles secure with the BESTfit Bushing Kit with 4 Rubber Shackles & Shock Bushings for EB2 type ends. Featuring...
    29-05100002
    SKU:
    29-05100002
    Color:
    Black
    Material Options:
    Rubber
    Diameter Options:
    3/4 Inch
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $16.51
    Qty in Cart: 0
    Price:
    $16.51
    Subtotal:
  • Axle Beam Bushing Kit For SAF Holland/Neway

    Axle Beam Bushing Kit For SAF Holland/Neway

    AFTERMARKET

    $282.99
    Axle Beam Bushing Kit Replaces SRK139, 48100195* High Quality Axle Kit* Consists Of  - (2) 1-1/8 Inch Lock Nut - (4) Alignment Block  - (2) Pivot Bushing  - (4) Spacer Washer  - (2) 1-1/8 Inch X...
    29-05100006
    SKU:
    29-05100006
    Truck Class:
    Heavy Duty
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    Make:
    Trailer
    $282.99
    Qty in Cart: 0
    Price:
    $282.99
    Subtotal:
  • Pivot Connection Alignment Service Kit For Holland / Neway

    Pivot Connection Alignment Service Kit For Holland / Neway

    AFTERMARKET

    $346.99
    Pivot Connection Alignment Service Kit* High Quality Service Kit* Consists Of  - (2) Cap Screw 1-1/4 Inch-12 x 10-1/2 Inch - (4) Alignment Block  - (2) 1-1/4 Inch Lock Nut  - (2) Pivot Bushing  - (4)...
    29-05100048
    SKU:
    29-05100048
    Material Options:
    Steel
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    Make:
    Trailer
    $346.99
    Qty in Cart: 0
    Price:
    $346.99
    Subtotal:
  • Axle Connection Kit - E9296 For Holland/Neway

    Axle Connection Kit - E9296 For Holland/Neway

    AFTERMARKET

    $906.99
    Axle Connection Kit Replaces 48100246, SRK189* High Quality Axle Connection Kit* Consists Of  - (2) Axle Connection Bushing Front  - (2) Axle Connection Bushing Rear  - (8) 7/8 Inch HD Lock Washers...
    29-05100032
    SKU:
    29-05100032
    Material Options:
    Steel
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    Make:
    Trailer
    $906.99
    Qty in Cart: 0
    Price:
    $906.99
    Subtotal:
  • Insulator Service Repair Kit - SRK1401 For Watson & Chalin

    Insulator Service Repair Kit - SRK1401 For Watson & Chalin

    AFTERMARKET

    $183.99
    Insulator Service Repair Kit Replaces SRK1401* High Quality Service Repair Kit* Consists Of  - (2) 7/8 Inch-14 X 7.5 Inch Insulator Bolt - (2) Spring Bolt - (8) 7/8 Inch Washer - (4) 7/8 Inch Lock...
    29-05100007
    SKU:
    29-05100007
    Material Options:
    Steel
    Truck Class:
    Heavy Duty
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    Make:
    Trailer
    $183.99
    Qty in Cart: 0
    Price:
    $183.99
    Subtotal:
  • Automatic Slack Adjuster Wrench- 7/16 Inch

    Automatic Slack Adjuster Wrench- 7/16 Inch

    AUTOMANN USA

    $32.59
    7/16 Inch Slack Adjuster Wrench Replaces 33205, 7578Achieve accurate slack adjuster settings with the 7/16 Inch Automatic Slack Adjuster Wrench, crafted for durability and ease of operation. The...
    09-21000097
    SKU:
    09-21000097
    Truck Class:
    Universal
    Material Options:
    Steel
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $32.59
    Qty in Cart: 0
    Price:
    $32.59
    Subtotal:
  • Center Bolt Metric 12MM X 150MM

    Center Bolt Metric 12MM X 150MM

    AUTOMANN USA

    $3.38
    12MM X 150MM Center Bolt* High Quality Center Bolt* 12MM OD X 150MM Length* 18MM X 12MM Head* Sold Individually * Warranty On Center Bolts Against Defects In Workmanship & Material From Date Of...
    09-05250034
    SKU:
    09-05250034
    Material Options:
    Steel
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $3.38
    Qty in Cart: 0
    Price:
    $3.38
    Subtotal:
  • Camshaft Tube Bushing 17.75 Inch - E4737A

    Camshaft Tube Bushing 17.75 Inch - E4737A

    AFTERMARKET

    $77.99
    Replacement Camshaft Tube Bushing For Support End 112.11624, Spider End 112.11623* High Quality Camshaft Tube* Dimensions: - 17.75 Inch Length - 1.875 Inch Support End ID* Made In USA* Sold...
    09-05170217
    SKU:
    09-05170217
    Truck Class:
    Universal
    Length Options:
    17 3/4 Inch
    Material Options:
    Cast Iron
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $77.99
    Qty in Cart: 0
    Price:
    $77.99
    Subtotal:
  • BESTfit Poly Bracket Kit Replaces BSH108, BSH172, BSHLWSU For Fontaine Fifth Wheel

    BESTfit Poly Bracket Kit Replaces BSH108, BSH172, BSHLWSU For Fontaine Fifth Wheel

    BESTFIT TRUCK PARTS

    $21.61
    BESTfit Poly Upper and Lower Brackets Fits Fontaine Fifth WheelRestore reliable fifth wheel operation with the BESTfit Poly Bracket Kit for Fontaine Fifth Wheels. Constructed from durable...
    09-05110026
    SKU:
    09-05110026
    Material Options:
    Plastic/Poly
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $21.61
    Qty in Cart: 0
    Price:
    $21.61
    Subtotal:
  • Hex Bolt 1/2-6 X 7 Inch - Grade 8 For Ridewell

    Hex Bolt 1/2-6 X 7 Inch - Grade 8 For Ridewell

    AFTERMARKET

    $53.99
    7 Inch Hex Bolt W/ 1-1/2 Inch -6 Thread Replaces E9445, R309445, And 1130670B105* High Quality Bolt* 1-1/2 Inch -6 * 7.0 Inch Length* Note Shoulder Is 3.0In* Hex Bolt* Pitch- Coarse* Made In USA*...
    09-05250068
    SKU:
    09-05250068
    Material Options:
    Steel
    Truck Class:
    Universal
    Length Options:
    7 Inch
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $53.99
    Qty in Cart: 0
    Price:
    $53.99
    Subtotal:
  • BESTfit Bronze Bushing 11/16 OD X 9/16 ID X 1-3/4 Inch

    BESTfit Bronze Bushing 11/16 OD X 9/16 ID X 1-3/4 Inch

    BESTFIT TRUCK PARTS

    $8.09
    BESTfit 1.75 Inch Bronze Bushing Replaces 1407700, 01407700, 014-077-00* High Quality Bushing* Bronze* Dimensions: - 1.75 Inch Length - 0.688 Inch OD - 0.563 Inch ID* Sold Individually * Warranty On...
    09-05090014
    SKU:
    09-05090014
    Diameter Options:
    1/2 Inch
    Material Options:
    Bronze
    Truck Class:
    Universal
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $8.09
    Qty in Cart: 0
    Price:
    $8.09
    Subtotal:
  • Poly Slide Bracket Bushing - D203 For Fontaine

    Poly Slide Bracket Bushing - D203 For Fontaine

    AUTOMANN USA

    $23.12
    Poly 1.25 ID X 4 OD Slide Bracket Bushing Replaces D203, E7445, 10002, R307445, & 13501U* High Quality Slide Bracket Bushing* Poly * Dimensions: - 1.25 Inch ID  - 4.00 Inch OD * Thickness- 2.45 Inch*...
    09-05110027
    SKU:
    09-05110027
    Truck Class:
    Universal
    Diameter Options:
    1 1/4 Inch
    Material Options:
    Plastic/Poly
    Make:
    Universal Items
    Product Type:
    Frame & Chassis
    $23.12
    Qty in Cart: 0
    Price:
    $23.12
    Subtotal:
  • Total: items /

Adding your products to cart

View Cart Continue Shopping
Enhance your Peterbilt 388 with durable Peterbilt 377, 378, 388, and 389 frame crossmembers and stylish covers. From stainless steel and aluminum options to fiberglass and steel designs, this product lineup offers a variety of high-quality products to protect your truck's rear frame. Keep your rig looking its best with customizable covers that feature notch cutouts, light openings, and emblem mounts. Plus, find the right walking beam components to ensure a smooth, comfortable ride. Whether you're restoring a classic Peterbilt or upgrading a newer model, this collection of frame crossmembers and covers has everything you need to elevate your Peterbilt 388's appearance and functionality.

Frequently Asked Questions About Peterbilt 388 Frame Crossmembers & Covers

What are frame crossmembers and covers used for on a Peterbilt 388?

Frame crossmembers are structural components that run horizontally between the frame rails, providing rigidity and support for the chassis, while covers protect these areas from road debris, moisture, and corrosion. Together they help maintain frame integrity and give the underside of the truck a cleaner, finished appearance.

Will these crossmembers and covers fit my specific Peterbilt 388 configuration?

Fitment can vary depending on wheelbase, frame rail spacing, and whether your truck has factory or aftermarket modifications. It is important to check the listed specifications and, when possible, compare part numbers with your truck's build sheet or consult with our parts team before ordering to confirm a proper fit.

What materials are these parts made from, and how well do they hold up over time?

Most crossmembers and covers are constructed from steel or aluminum, depending on the specific part and application. Steel components typically offer strength and durability for structural crossmembers, while aluminum covers are often chosen for their corrosion resistance and lighter weight. Finish options may include raw metal, painted, or powder-coated surfaces to help resist rust and wear from daily use.

Can I install a crossmember or cover myself, or should I have a professional do it?

Covers are generally straightforward to install with basic tools and can often be handled by anyone comfortable with routine truck maintenance. Structural crossmembers, however, are load-bearing components, and improper installation can affect frame integrity and safety. For crossmember replacement or modification, we recommend having the work done by a qualified technician familiar with frame repairs.

How do I know if my current crossmember or cover needs to be replaced?

Common signs include visible rust or corrosion, cracks, bending, loose or missing mounting hardware, or a cover that no longer sits flush and allows debris underneath. If you notice any flexing or unusual noise from the frame area while driving, it is a good idea to have the crossmember inspected as soon as possible.

Steals & Deals Sign Up

Prefer to text? Receive exclusive deals by SMS*

Introducing the Official 4 State Trucks Mobile App – Gear Up On the Go!