UMI Performance Adjustable Upper and Lower Rear Control Arm Kit Black (101417B) - 1999-2004 Ford Mustang
Take greater control of the rear suspension on your 1999-2004 Ford Mustang with the UMI Performance Adjustable Upper and Lower Rear Control Arm Kit. This complete performance package combines UMI single adjustable lower control arms with on-car double adjustable upper control arms, replacing the factory components with a stronger and more tunable suspension setup designed for improved traction, handling, and consistency.
Built for performance-oriented street, track, and autocross applications, the 101417B kit is designed to minimize wheel hop, improve cornering, help lower elapsed times, and provide more consistent suspension performance. The adjustable upper control arms also provide convenient on-car pinion angle adjustment, making it easier to dial in the rear suspension for the vehicle's specific combination.
Complete Adjustable Upper and Lower Control Arm Package
The UMI 101417B kit provides a comprehensive rear control arm upgrade by including both single adjustable lower control arms and double adjustable upper control arms. Together, these components replace the factory rear control arms with stronger tubular assemblies designed to provide improved axle control and additional suspension tuning capability.
This combination is particularly useful for modified Mustangs where increased power, traction, or changes to the suspension setup make greater control of rear axle movement and pinion angle desirable.
On-Car Double Adjustable Upper Control Arms
A key advantage of the 101417B package is its set of on-car double adjustable upper control arms. The adjustable design allows pinion angle changes to be made quickly and easily without requiring the control arms to be removed from the vehicle.
Proper pinion angle adjustment can be an important part of optimizing a performance-oriented rear suspension setup. The on-car adjustment capability makes it easier to fine-tune the Mustang as the vehicle's ride height, drivetrain, traction, or track setup changes.
Single Adjustable Lower Control Arms
The included single adjustable lower control arms provide a strong replacement for the factory components while adding suspension adjustment capability. They are constructed from heavy-duty DOM mild steel tubing with a 0.120-inch wall thickness and utilize a chrome-moly threaded tube adapter for strength and durability.
The stronger tubular construction helps reduce the flex associated with factory-style control arms, allowing the rear axle to remain more controlled during hard acceleration and aggressive cornering.
Improved Traction and Reduced Wheel Hop
Unwanted control arm and bushing movement can allow the rear axle to shift under load, contributing to wheel hop and inconsistent traction. UMI's upgraded tubular control arms, polyurethane bushings, and spherical rod ends are designed to provide greater control over rear axle movement.
Reducing unwanted deflection helps the rear suspension work more predictably during acceleration, giving performance-oriented Mustangs a stronger foundation for improved launches, lower ETs, and greater track consistency.
Improved Cornering and Suspension Response
The benefits of increased rear axle control extend beyond straight-line performance. Reducing control arm flex and excessive bushing deflection can also improve suspension response during cornering, making the rear of the vehicle feel more controlled and predictable.
This makes the 101417B package a strong choice for Mustangs used in autocross and other performance driving applications where both traction and handling are priorities.
Bind-Free Spherical Rod End Operation
UMI incorporates high-quality QA1 Teflon-lined spherical rod ends to provide smooth, bind-free suspension movement. The spherical design allows the suspension to articulate as needed while maintaining precise control over the rear axle.
This combination of increased rigidity and smooth articulation is especially beneficial in track and autocross applications where unrestricted suspension movement and predictable response are important.
Polyurethane Bushings for Quiet, Comfortable Operation
The control arms use high-quality polyurethane bushings at the appropriate chassis mounting locations. These bushings reduce the excessive deflection associated with soft factory rubber while retaining quieter and more comfortable operation than a completely solid-mounted suspension arrangement.
This allows the kit to provide increased rear suspension performance while remaining suitable for Mustangs that continue to see street use.
Heavy-Duty Lower Control Arm Construction
The lower control arms are manufactured from DOM mild steel tubing with a 0.120-inch wall thickness and feature chrome-moly threaded tube adapters. This construction provides the strength and rigidity needed to withstand the increased suspension loads encountered during performance driving.
The lower arms also incorporate reinforced spring perches and heavy-duty sway bar mounting points, strengthening critical areas of the assembly for demanding street and track applications.
Heavy-Duty Adjustable Upper Control Arm Construction
The upper control arms feature 0.250-inch mild steel mounting points along with chrome-moly tube adapters and solid adjusters. These components create a durable adjustable assembly capable of providing precise pinion angle tuning while handling the loads transmitted through the Mustang's rear suspension.
Greaseable Components for Easy Maintenance
High-quality polyurethane bushings are paired with zinc-plated steel sleeves and greaseable zerk fittings. The grease fittings provide convenient access for routine lubrication, helping simplify maintenance and promote smooth bushing operation over time.
Reinforced Spring Perches and Sway Bar Mounts
The lower control arms include reinforced spring perches and heavy-duty sway bar mounting points. These strengthened areas provide the durability needed for performance use while retaining the necessary mounting locations for the Mustang's rear suspension components.
Direct Bolt-On Installation
The UMI 101417B control arm kit is designed as a direct bolt-on upgrade using the Mustang's OEM mounting hardware. No drilling is required, allowing the complete upper and lower control arm package to be installed without extensive chassis modification.
UMI lists an approximate installation time of one hour, providing a straightforward path to a stronger, more adjustable rear suspension system.
Features
- Complete adjustable upper and lower rear control arm package
- Includes UMI Performance single adjustable lower control arms
- Includes UMI on-car double adjustable upper control arms
- Designed to minimize rear suspension wheel hop
- Improves rear axle control
- Designed to improve cornering performance
- Helps improve traction during acceleration
- Designed to help lower elapsed times
- Helps improve track consistency
- On-car upper control arm adjustment
- Allows quick and easy pinion angle adjustment
- Spherical rod ends provide smooth, bind-free operation
- High-quality QA1 Teflon-lined spherical rod ends
- Polyurethane bushings provide increased control with quiet, comfortable operation
- Lower control arms constructed from DOM mild steel tubing
- Lower control arms feature 0.120-inch wall thickness
- Lower control arms use chrome-moly threaded tube adapters
- Upper control arms feature 0.250-inch mild steel mounting points
- Upper control arms use chrome-moly tube adapters
- Upper control arms feature solid adjusters
- High-quality polyurethane bushings
- Zinc-plated steel sleeves
- Greaseable zerk fittings simplify routine maintenance
- Reinforced lower control arm spring perches
- Heavy-duty sway bar mounting points
- Suitable for performance street, track, and autocross applications
- Direct bolt-on installation
- No drilling required
- Uses OEM mounting hardware
- Approximate installation time of 1 hour
- Black finish
Fitment
- 1999 Ford Mustang
- 2000 Ford Mustang
- 2001 Ford Mustang
- 2002 Ford Mustang
- 2003 Ford Mustang
- 2004 Ford Mustang
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