UMI Performance 68-72 GM A-Body Rear Shock Tower Brace Bolt In

SKU: UMI4058-B
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About UMI Performance

UMI Performance engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full UMI Performance lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

UMI Performance 68-72 GM A-Body Rear Shock Tower Brace - Bolt-In

Enhance the structural rigidity and handling of your 1968-1972 GM A-Body with the UMI Performance 4058-B Rear Shock Tower Brace. This essential chassis stiffening component ties the upper shock mounts together, effectively distributing loads and reducing flex for a more responsive and predictable driving experience. Constructed from strong 1-1/4-inch tubing and MIG-welded to precision-cut 3/16-inch thick brackets, this brace is built for durability and a perfect fit. The straightforward bolt-in installation requires no permanent modifications, making it an accessible upgrade for any enthusiast.

Benefits of a Stiffer Chassis:

  • Increased Chassis Rigidity: Connects upper shock mounts to minimize chassis flex under load.
  • Improved Handling: Reduces body roll and enhances suspension responsiveness.
  • Easy Bolt-In Installation: Hardware included for a simple, direct fit without welding.
  • Universal Fit: Designed to clear most popular exhaust systems and compatible with both coilover and traditional spring/shock setups.
  • Durable Construction: Features 1-1/4" tubing and 3/16" thick laser-cut mounting brackets.
  • Premium Finish: Available in durable black or red powder coat options.
  • Made in USA: Manufactured with high-quality US steel in Philipsburg, PA.

The UMI Performance Rear Shock Tower Brace is a crucial upgrade for anyone looking to maximize their A-Body's performance potential, whether for street, autocross, or track use. By strengthening the rear chassis, you'll notice a significant improvement in steering feel and overall stability. Get the competitive edge and a more connected driving feel with this high-quality brace from UMI Performance, available at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1970-1972 Buick GS Base
1968-1969 Buick GS 350 Base
1968-1969 Buick GS 400 Base
1970 Buick GS 455 GSX
1970-1972 Buick GS 455 Base
1968-1972 Buick Skylark Base
1968-1972 Buick Skylark Custom
1970 Buick Skylark 350
1972 Buick Skylark 350
1968 Chevrolet Chevelle 300
1968 Chevrolet Chevelle Base
1968-1969 Chevrolet Chevelle 300 Deluxe
1968-1972 Chevrolet Chevelle Malibu
1968-1972 Chevrolet Chevelle Nomad
1968-1972 Chevrolet Chevelle SS
1968-1972 Chevrolet Chevelle Concours
1969-1972 Chevrolet Chevelle Concours Estate
1970-1972 Chevrolet Chevelle Base
1970-1972 Chevrolet Monte Carlo Base
1968-1971 Oldsmobile 442 Base
1968-1972 Oldsmobile Cutlass Base
1971-1972 Oldsmobile Cutlass S
1972 Oldsmobile Cutlass Cruiser
1968-1972 Pontiac GTO Base
1970-1971 Pontiac GTO The Judge
1969-1972 Pontiac Grand Prix Base
1968-1972 Pontiac LeMans Base
1969-1970 Pontiac LeMans Safari
1970-1972 Pontiac LeMans Sport
1972 Pontiac LeMans Luxury
1968-1969 Pontiac Tempest Custom
1968-1969 Pontiac Tempest Safari
1968-1970 Pontiac Tempest Base
1970 Pontiac Tempest GT

Product Details

Product Description
Part Numbers
Sizing & Fit

About UMI Performance

UMI Performance engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full UMI Performance lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

UMI Performance 68-72 GM A-Body Rear Shock Tower Brace - Bolt-In

Enhance the structural rigidity and handling of your 1968-1972 GM A-Body with the UMI Performance 4058-B Rear Shock Tower Brace. This essential chassis stiffening component ties the upper shock mounts together, effectively distributing loads and reducing flex for a more responsive and predictable driving experience. Constructed from strong 1-1/4-inch tubing and MIG-welded to precision-cut 3/16-inch thick brackets, this brace is built for durability and a perfect fit. The straightforward bolt-in installation requires no permanent modifications, making it an accessible upgrade for any enthusiast.

Benefits of a Stiffer Chassis:

  • Increased Chassis Rigidity: Connects upper shock mounts to minimize chassis flex under load.
  • Improved Handling: Reduces body roll and enhances suspension responsiveness.
  • Easy Bolt-In Installation: Hardware included for a simple, direct fit without welding.
  • Universal Fit: Designed to clear most popular exhaust systems and compatible with both coilover and traditional spring/shock setups.
  • Durable Construction: Features 1-1/4" tubing and 3/16" thick laser-cut mounting brackets.
  • Premium Finish: Available in durable black or red powder coat options.
  • Made in USA: Manufactured with high-quality US steel in Philipsburg, PA.

The UMI Performance Rear Shock Tower Brace is a crucial upgrade for anyone looking to maximize their A-Body's performance potential, whether for street, autocross, or track use. By strengthening the rear chassis, you'll notice a significant improvement in steering feel and overall stability. Get the competitive edge and a more connected driving feel with this high-quality brace from UMI Performance, available at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1970-1972 Buick GS Base
1968-1969 Buick GS 350 Base
1968-1969 Buick GS 400 Base
1970 Buick GS 455 GSX
1970-1972 Buick GS 455 Base
1968-1972 Buick Skylark Base
1968-1972 Buick Skylark Custom
1970 Buick Skylark 350
1972 Buick Skylark 350
1968 Chevrolet Chevelle 300
1968 Chevrolet Chevelle Base
1968-1969 Chevrolet Chevelle 300 Deluxe
1968-1972 Chevrolet Chevelle Malibu
1968-1972 Chevrolet Chevelle Nomad
1968-1972 Chevrolet Chevelle SS
1968-1972 Chevrolet Chevelle Concours
1969-1972 Chevrolet Chevelle Concours Estate
1970-1972 Chevrolet Chevelle Base
1970-1972 Chevrolet Monte Carlo Base
1968-1971 Oldsmobile 442 Base
1968-1972 Oldsmobile Cutlass Base
1971-1972 Oldsmobile Cutlass S
1972 Oldsmobile Cutlass Cruiser
1968-1972 Pontiac GTO Base
1970-1971 Pontiac GTO The Judge
1969-1972 Pontiac Grand Prix Base
1968-1972 Pontiac LeMans Base
1969-1970 Pontiac LeMans Safari
1970-1972 Pontiac LeMans Sport
1972 Pontiac LeMans Luxury
1968-1969 Pontiac Tempest Custom
1968-1969 Pontiac Tempest Safari
1968-1970 Pontiac Tempest Base
1970 Pontiac Tempest GT

Product Details

Product Description

About UMI Performance

UMI Performance engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full UMI Performance lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

UMI Performance 68-72 GM A-Body Rear Shock Tower Brace - Bolt-In

Enhance the structural rigidity and handling of your 1968-1972 GM A-Body with the UMI Performance 4058-B Rear Shock Tower Brace. This essential chassis stiffening component ties the upper shock mounts together, effectively distributing loads and reducing flex for a more responsive and predictable driving experience. Constructed from strong 1-1/4-inch tubing and MIG-welded to precision-cut 3/16-inch thick brackets, this brace is built for durability and a perfect fit. The straightforward bolt-in installation requires no permanent modifications, making it an accessible upgrade for any enthusiast.

Benefits of a Stiffer Chassis:

  • Increased Chassis Rigidity: Connects upper shock mounts to minimize chassis flex under load.
  • Improved Handling: Reduces body roll and enhances suspension responsiveness.
  • Easy Bolt-In Installation: Hardware included for a simple, direct fit without welding.
  • Universal Fit: Designed to clear most popular exhaust systems and compatible with both coilover and traditional spring/shock setups.
  • Durable Construction: Features 1-1/4" tubing and 3/16" thick laser-cut mounting brackets.
  • Premium Finish: Available in durable black or red powder coat options.
  • Made in USA: Manufactured with high-quality US steel in Philipsburg, PA.

The UMI Performance Rear Shock Tower Brace is a crucial upgrade for anyone looking to maximize their A-Body's performance potential, whether for street, autocross, or track use. By strengthening the rear chassis, you'll notice a significant improvement in steering feel and overall stability. Get the competitive edge and a more connected driving feel with this high-quality brace from UMI Performance, available at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1970-1972 Buick GS Base
1968-1969 Buick GS 350 Base
1968-1969 Buick GS 400 Base
1970 Buick GS 455 GSX
1970-1972 Buick GS 455 Base
1968-1972 Buick Skylark Base
1968-1972 Buick Skylark Custom
1970 Buick Skylark 350
1972 Buick Skylark 350
1968 Chevrolet Chevelle 300
1968 Chevrolet Chevelle Base
1968-1969 Chevrolet Chevelle 300 Deluxe
1968-1972 Chevrolet Chevelle Malibu
1968-1972 Chevrolet Chevelle Nomad
1968-1972 Chevrolet Chevelle SS
1968-1972 Chevrolet Chevelle Concours
1969-1972 Chevrolet Chevelle Concours Estate
1970-1972 Chevrolet Chevelle Base
1970-1972 Chevrolet Monte Carlo Base
1968-1971 Oldsmobile 442 Base
1968-1972 Oldsmobile Cutlass Base
1971-1972 Oldsmobile Cutlass S
1972 Oldsmobile Cutlass Cruiser
1968-1972 Pontiac GTO Base
1970-1971 Pontiac GTO The Judge
1969-1972 Pontiac Grand Prix Base
1968-1972 Pontiac LeMans Base
1969-1970 Pontiac LeMans Safari
1970-1972 Pontiac LeMans Sport
1972 Pontiac LeMans Luxury
1968-1969 Pontiac Tempest Custom
1968-1969 Pontiac Tempest Safari
1968-1970 Pontiac Tempest Base
1970 Pontiac Tempest GT

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