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UMI Performance 68-72 GM A-Body Rear Shock Tower Brace Bolt In is UMI Performance manufacturer part number 4058-R, selected by the verified year, make, and model applications below. This rear shock tower brace is built using 3/16" thick precision laser-cut steel for strength and a precise fit, tying the rear upper shock mounts together to distribute load and stiffen the chassis. Each brace is MIG welded for durability and long-term performance. Hardware is included for an easy bolt-in installation. Designed to clear popular exhaust systems, this brace works well with both coilover setups and traditional spring and shock combinations. Available in black or red powder coat. Manufactured and tested in Philipsburg, PA, USA. Note: Does not fit wagon or El Camino models. Car only.
Fitment
| Years | Make | Model | Application Notes |
|---|---|---|---|
| 1970-1972 | Buick | GS | Confirm every UMI Performance application note and factory configuration |
| 1968-1969 | Buick | GS 350 | Confirm every UMI Performance application note and factory configuration |
| 1968-1969 | Buick | GS 400 | Confirm every UMI Performance application note and factory configuration |
| 1970-1972 | Buick | GS 455 | Confirm every UMI Performance application note and factory configuration |
| 1968-1972 | Buick | Skylark | Confirm every UMI Performance application note and factory configuration |
| 1968-1972 | Chevrolet | Chevelle | Confirm every UMI Performance application note and factory configuration |
| 1970-1972 | Chevrolet | Monte Carlo | Confirm every UMI Performance application note and factory configuration |
| 1968-1971 | Oldsmobile | 442 | Confirm every UMI Performance application note and factory configuration |
| 1968-1972 | Oldsmobile | Cutlass | Confirm every UMI Performance application note and factory configuration |
| 1968-1972 | Pontiac | GTO | Confirm every UMI Performance application note and factory configuration |
| 1969-1972 | Pontiac | Grand Prix | Confirm every UMI Performance application note and factory configuration |
| 1968-1972 | Pontiac | LeMans | Confirm every UMI Performance application note and factory configuration |
| 1968-1970 | Pontiac | Tempest | Confirm every UMI Performance application note and factory configuration |
Specifications
| Brand | UMI Performance |
|---|---|
| Manufacturer Part Number | 4058-R |
| Product Type | Strut Bars |
| Application Type | Vehicle Specific |
| Condition | New |
What's Included
One new UMI Performance strut bars package identified by manufacturer part number 4058-R, plus only the hardware and accessories expressly shown or stated for this exact part number
About UMI Performance
UMI Performance designs and manufactures suspension, chassis, steering, and handling components for American performance vehicles in Philipsburg, Pennsylvania.
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Frequently Asked Questions
How do I confirm UMI Performance 4058-R is correct for my application?
Match the exact manufacturer part number, year, make, model, factory configuration, dimensions, connection points, and every current UMI Performance note.
Are similar UMI Performance parts interchangeable with 4058-R?
No. Mounting points, dimensions, adjustment range, material, finish, bushing style, and included hardware can differ between part numbers.
What should be checked after installing UMI Performance 4058-R?
Inspect fasteners, bushings, joints, clearances, alignment, ride height, and suspension movement after installation and again after the initial road test.
Installation
Follow the current UMI Performance instructions for manufacturer part number 4058-R. Confirm all torque values, mounting locations, bushings, joints, clearances, ride height, and alignment requirements. Professional installation and a post-installation alignment are recommended when the component changes suspension geometry.
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