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International 9900/i/ix Torque Rods & U-Bolts

Revitalize your ride with high-quality torque rods, U-bolts, and bushing kits. Improve your International 9900/i/ix today!
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  • BESTfit 15.625 Inch Fixed Torque Rod For International TranStar, 9200, 9400, 9900, ProStar

    BESTfit 15.625 Inch Fixed Torque Rod For International TranStar, 9200, 9400, 9900, ProStar

    BESTFIT TRUCK PARTS

    $233.99
    BESTfit Hendrickson HTB 400LT Fixed Torque Rod Fits InternationalReinforce your International suspension with this BESTfit 15.625 Inch Fixed Torque Rod. Constructed with a 1-1/4 inch shaft diameter...
    07-051038
    SKU:
    07-051038
    Truck Class:
    Heavy Duty
    Length Options:
    15 Inch
    Make:
    International
    Product Type:
    Frame & Chassis
    $233.99
    Qty in Cart: 0
    Price:
    $233.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit Poly Torque Rod Bushing For NaviStar Rear Corporate 3.5 Inch Single & Tandem Axles & Rear Z Air Spring

    BESTfit Poly Torque Rod Bushing For NaviStar Rear Corporate 3.5 Inch Single & Tandem Axles & Rear Z Air Spring

    BESTFIT TRUCK PARTS

    $85.99
    BESTfit 4.375 Center To Center X 2.75 Inch Torque Rod BushingEnsure precise torque rod alignment on Navistar Rear Corporate 3.5-inch axles with the BESTfit Poly Torque Rod Bushing. Designed for...
    07-051029K01
    SKU:
    07-051029K01
    Truck Class:
    Heavy Duty
    Diameter Options:
    2 Inch
    Length Options:
    4 Inch
    Material Options:
    Plastic/Poly
    Make:
    International
    Product Type:
    Frame & Chassis
    $85.99
    Qty in Cart: 0
    Price:
    $85.99
    Subtotal:
  • BESTfit Semi-Round U-Bolt Kit 7/8 X 3.5 X 15 Inch Replaces 1610312C2 For International Rear Z 3.5 Inch Air Spring

    BESTfit Semi-Round U-Bolt Kit 7/8 X 3.5 X 15 Inch Replaces 1610312C2 For International Rear Z 3.5 Inch Air Spring

    BESTFIT TRUCK PARTS

    $59.99
    BESTfit U-Bolt Kit Fits InternationalRely on the BESTfit Semi-Round U-Bolt Kit to maintain your International truck's rear air spring support. This heavy-duty kit includes two semi-round U bolts,...
    07-051021
    SKU:
    07-051021
    Width Options:
    3 Inch
    Length Options:
    15 Inch
    Truck Class:
    Heavy Duty
    Make:
    International
    Product Type:
    Frame & Chassis
    $59.99
    Qty in Cart: 0
    Price:
    $59.99
    Subtotal:
  • Semi-Round U-Bolt Kit 3/4 X 3.5 X 13.25 Inch For International Rear Z 3.5 Inch Air Spring

    Semi-Round U-Bolt Kit 3/4 X 3.5 X 13.25 Inch For International Rear Z 3.5 Inch Air Spring

    AFTERMARKET

    $40.76
    U-Bolt Kit Fits International - Replaces 586593C1, 590575C1 & 590621C1Secure your International truck's rear air spring with the Semi-Round U-Bolt Kit, designed for 3.5-inch air springs. This...
    07-051020
    SKU:
    07-051020
    Truck Class:
    Heavy Duty
    Width Options:
    3 Inch
    Diameter Options:
    3/4 Inch
    Length Options:
    13 Inch
    Make:
    International
    Product Type:
    Frame & Chassis
    $40.76
    Qty in Cart: 0
    Price:
    $40.76
    Subtotal:
  • 6.75 Inch U-Bolt Top Plate For International Rear Z 3.5 Inch Air Spring

    6.75 Inch U-Bolt Top Plate For International Rear Z 3.5 Inch Air Spring

    AFTERMARKET

    $58.99
    U-Bolt Top Plate Fits International Replaces 16005070 & 572112C1 & 572112C2Reinforce the stability of your International truck's rear Z air springs with the 6.75 Inch U-Bolt Top Plate, crafted for 3...
    07-051019
    SKU:
    07-051019
    Truck Class:
    Heavy Duty
    Width Options:
    3 Inch
    Length Options:
    8 Inch
    Make:
    International
    Product Type:
    Frame & Chassis
    $58.99
    Qty in Cart: 0
    Price:
    $58.99
    Subtotal:
  • 2.467 X 4.375 Inch Torque Rod Bushing For International Rear Z 3.5 Inch Air Spring & Rear Corporate Suspensions

    2.467 X 4.375 Inch Torque Rod Bushing For International Rear Z 3.5 Inch Air Spring & Rear Corporate Suspensions

    AFTERMARKET

    $50.99
    Torque Rod Bushing Fits International - Replaces 57256Restore proper suspension performance with the 2.467 x 4.375 Inch Torque Rod Bushing, designed specifically for International rear Z 3.5-inch air...
    07-051016
    SKU:
    07-051016
    Truck Class:
    Heavy Duty
    Length Options:
    4 Inch
    Make:
    International
    Product Type:
    Frame & Chassis
    $50.99
    Qty in Cart: 0
    Price:
    $50.99
    Subtotal:
  • BESTfit 18.125 Inch Torque Rod For International Rear Z 3.5 Inch Air Spring & Rear Corporate Suspensions

    BESTfit 18.125 Inch Torque Rod For International Rear Z 3.5 Inch Air Spring & Rear Corporate Suspensions

    BESTFIT TRUCK PARTS

    $133.99
    BESTfit Torque Rod Fits International - Replaces 493920C3, 588117C91 & SB1474Reinforce your International truck's rear suspension with this BESTfit 18.125 Inch Torque Rod. This torque rod features a...
    07-051015
    SKU:
    07-051015
    Length Options:
    18 Inch
    Truck Class:
    Heavy Duty
    Make:
    International
    Product Type:
    Frame & Chassis
    $133.99
    Qty in Cart: 0
    Price:
    $133.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit 25.375 Inch Torque Rod Replaces 4C4Z4264CA, 3548381C1 & 358088C1 For International

    BESTfit 25.375 Inch Torque Rod Replaces 4C4Z4264CA, 3548381C1 & 358088C1 For International

    BESTFIT TRUCK PARTS

    $119.99
    BESTfit Torque Rod - Replaces 501565C1, 501565C2 & 17QF358P8This BESTfit 25.375 Inch Torque Rod for International trucks is designed as a durable replacement to help maintain proper axle positioning...
    07-0510016K01
    SKU:
    07-0510016K01
    Length Options:
    25 Inch
    Truck Class:
    Heavy Duty
    Make:
    International
    Product Type:
    Frame & Chassis
    $119.99
    Qty in Cart: 0
    Price:
    $119.99
    Subtotal:
  • FREE SHIPPING OVER $249
    BESTfit U-Bolt Kit 3/4 X 4 X 10.25 Inch Replaces 15983092, 15983095 & 15983097 For International

    BESTfit U-Bolt Kit 3/4 X 4 X 10.25 Inch Replaces 15983092, 15983095 & 15983097 For International

    BESTFIT TRUCK PARTS

    $41.76
    BESTfit 3/4 X 4 X 10.25 Inch U-Bolt Kit - Replaces 453895C1, 465916C1, 465916C91 & 02-01375-100* High Quality U-Bolt Kit* Kit Includes:  - (2) U Bolts (Semi-Round Bend)  - 10.25 Inch Overall Length ...
    07-050966K01
    SKU:
    07-050966K01
    Length Options:
    10 Inch
    Truck Class:
    Heavy Duty
    Width Options:
    4 Inch
    Diameter Options:
    3/4 Inch
    Make:
    International
    Product Type:
    Frame & Chassis
    Ready To Ship:
    Yes
    $41.76
    Qty in Cart: 0
    Price:
    $41.76
    Subtotal:
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Shop reliable torque rods and u-bolts for International 9900/i/ix and other models like 9200, 9400, and ProStar in this product lineup. Featuring trusted brands like BESTfit, it offers essential parts for maintaining and upgrading truck suspensions. These components ensure a perfect fit with options for torque rods, bushings, and u-bolts in adjustable, fixed, and sealed designs. Additional items like shims and mounting hardware provide a complete solution for repairs and routine maintenance, keeping your truck running smoothly and safely.

Frequently Asked Questions About International 9900/i/ix Torque Rods & U-Bolts

What do torque rods and U-bolts do on my International 9900/i/ix?

Torque rods connect the drive axle housing to the truck frame or suspension components, controlling axle rotation under acceleration and braking while keeping the driveline aligned. U-bolts clamp the axle housing or leaf springs securely to the suspension, keeping everything locked in place under load. Together, these parts help maintain suspension geometry, reduce vibration, and prevent premature wear on other drivetrain components.

How do I know if my torque rods or U-bolts need to be replaced?

Common signs include a clunking or knocking noise from the rear axle area, unusual driveline vibration, uneven tire wear, or visible cracking, rust, or bending on the rod or bolt itself. If you notice play in the axle housing when the truck is stationary, or if a rod bushing looks worn or deteriorated, it is a good idea to inspect the parts closely and replace them before they fail completely.

Will these torque rods and U-bolts fit my specific 9900, 9900i, or 9900ix model?

Fitment can vary depending on the exact model year, axle configuration, and suspension setup on your truck. We recommend checking the listed specifications on each product page, including length, thread size, and mounting style, and comparing them to your OEM part or existing hardware before ordering. If you are unsure, having your VIN or axle/suspension part numbers on hand will help confirm the right fit.

Are these replacement parts OEM or aftermarket, and does that affect installation?

Our inventory includes a mix of OEM and quality aftermarket torque rods and U-bolts. Aftermarket parts are generally built to match OEM dimensions and mounting points, so installation steps are typically the same as replacing the original part. Always double check bolt torque specifications and hardware sizing against your service manual, since even small variances in length or diameter can affect proper clamping force or rod alignment.

Can I install torque rods and U-bolts myself, or should I have a shop do it?

Many experienced technicians and owner-operators handle this replacement themselves, since the job mainly involves unbolting the old hardware and torquing in the new parts to spec. That said, because torque rods affect axle alignment and U-bolts are critical to suspension safety, it is important to use a torque wrench and follow the correct tightening sequence and specifications. If you are not confident working under the truck or lack the right tools, having a qualified shop install these parts is a safer option.


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