UMI Performance 78-88 GM G-Body Rear Frame Notching Kit Weld-In

SKU: UMI3061
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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 Rear Frame Notching Kit for 78-88 GM G-Body

Achieve the aggressive stance and wider tire fitment you desire with the UMI Performance Rear Frame Notching Kit (P/N 3061). Specifically designed for the 1978-1988 GM G-Body platform (including Buick Regal, Chevrolet El Camino, Malibu, Monte Carlo, Oldsmobile Cutlass, and Pontiac LeMans/Grand Prix), this kit allows you to narrow the upper rear frame rails. This modification is essential for installing wider tires and achieving a lowered look without compromising suspension geometry.

Key Features and Benefits:

  • Wider Tire Clearance: Enables the fitment of wider rear tires for improved grip and aesthetics.
  • Precision Laser Cut: Manufactured from 1/8" premium steel with laser-cut precision to follow the frame contours accurately.
  • Easy Weld-In Design: Designed for straightforward welding with a standard MIG welder, featuring slight overhang for easy integration.
  • Includes End Enclosures: Comes with end caps to seamlessly bridge the notched section to the original frame.
  • Durable Construction: Built to withstand the demands of performance driving and street use.
  • Made in USA: Designed, manufactured, and tested in Philipsburg, PA.

Note: This kit requires cutting, welding, and general fabrication skills for proper installation. It's an ideal upgrade for custom builds, drag cars, or any G-Body owner looking to optimize tire fitment. Get your UMI Performance Rear Frame Notching Kit today at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1978-1982 Buick Regal Sport
1978-1987 Buick Regal Base
1978-1988 Buick Regal Limited
1982 Buick Regal Limited Turbo
1982-1983 Buick Regal Estate Wagon
1984-1987 Buick Regal Grand National
1987 Buick Regal GNX
1988 Buick Regal Custom
1978 Chevrolet El Camino Conquista
1978-1987 Chevrolet El Camino Base
1978-1987 Chevrolet El Camino SS
1979-1981 Chevrolet El Camino Royal Knight
1981-1986 Chevrolet El Camino Conquista
1978-1980 Chevrolet Malibu Classic Estate
1978-1981 Chevrolet Malibu Classic Landau
1978-1981 Chevrolet Malibu Base
1979 Chevrolet Malibu Landau
1979 Chevrolet Malibu Police
1979-1980 Chevrolet Malibu Classic Sport
1979-1980 Chevrolet Malibu Estate
1978 Chevrolet Monte Carlo Sport
1978-1981 Chevrolet Monte Carlo Landau
1979 Chevrolet Monte Carlo Base
1980 Chevrolet Monte Carlo Sport
1981-1988 Chevrolet Monte Carlo Base
1983 Chevrolet Monte Carlo CL
1986-1988 Chevrolet Monte Carlo LS
1978-1979 Oldsmobile Cutlass Vista Cruiser
1979 Oldsmobile Cutlass Vista Cruiser Brougham
1980 Oldsmobile Cutlass Base
1980-1981 Oldsmobile Cutlass Brougham
1980-1981 Oldsmobile Cutlass LS
1978-1980 Pontiac Grand Prix SJ
1978-1983 Pontiac Grand Prix LJ
1978-1988 Pontiac Grand Prix Base
1984-1988 Pontiac Grand Prix LE
1988 Pontiac Grand Prix SE
1978-1981 Pontiac LeMans Base
1988 Pontiac LeMans Aerocoupe
1988 Pontiac LeMans Aerocoupe YL
1988 Pontiac LeMans Base
1988 Pontiac LeMans SE
1988 Pontiac LeMans Value Leader

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 Rear Frame Notching Kit for 78-88 GM G-Body

Achieve the aggressive stance and wider tire fitment you desire with the UMI Performance Rear Frame Notching Kit (P/N 3061). Specifically designed for the 1978-1988 GM G-Body platform (including Buick Regal, Chevrolet El Camino, Malibu, Monte Carlo, Oldsmobile Cutlass, and Pontiac LeMans/Grand Prix), this kit allows you to narrow the upper rear frame rails. This modification is essential for installing wider tires and achieving a lowered look without compromising suspension geometry.

Key Features and Benefits:

  • Wider Tire Clearance: Enables the fitment of wider rear tires for improved grip and aesthetics.
  • Precision Laser Cut: Manufactured from 1/8" premium steel with laser-cut precision to follow the frame contours accurately.
  • Easy Weld-In Design: Designed for straightforward welding with a standard MIG welder, featuring slight overhang for easy integration.
  • Includes End Enclosures: Comes with end caps to seamlessly bridge the notched section to the original frame.
  • Durable Construction: Built to withstand the demands of performance driving and street use.
  • Made in USA: Designed, manufactured, and tested in Philipsburg, PA.

Note: This kit requires cutting, welding, and general fabrication skills for proper installation. It's an ideal upgrade for custom builds, drag cars, or any G-Body owner looking to optimize tire fitment. Get your UMI Performance Rear Frame Notching Kit today at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1978-1982 Buick Regal Sport
1978-1987 Buick Regal Base
1978-1988 Buick Regal Limited
1982 Buick Regal Limited Turbo
1982-1983 Buick Regal Estate Wagon
1984-1987 Buick Regal Grand National
1987 Buick Regal GNX
1988 Buick Regal Custom
1978 Chevrolet El Camino Conquista
1978-1987 Chevrolet El Camino Base
1978-1987 Chevrolet El Camino SS
1979-1981 Chevrolet El Camino Royal Knight
1981-1986 Chevrolet El Camino Conquista
1978-1980 Chevrolet Malibu Classic Estate
1978-1981 Chevrolet Malibu Classic Landau
1978-1981 Chevrolet Malibu Base
1979 Chevrolet Malibu Landau
1979 Chevrolet Malibu Police
1979-1980 Chevrolet Malibu Classic Sport
1979-1980 Chevrolet Malibu Estate
1978 Chevrolet Monte Carlo Sport
1978-1981 Chevrolet Monte Carlo Landau
1979 Chevrolet Monte Carlo Base
1980 Chevrolet Monte Carlo Sport
1981-1988 Chevrolet Monte Carlo Base
1983 Chevrolet Monte Carlo CL
1986-1988 Chevrolet Monte Carlo LS
1978-1979 Oldsmobile Cutlass Vista Cruiser
1979 Oldsmobile Cutlass Vista Cruiser Brougham
1980 Oldsmobile Cutlass Base
1980-1981 Oldsmobile Cutlass Brougham
1980-1981 Oldsmobile Cutlass LS
1978-1980 Pontiac Grand Prix SJ
1978-1983 Pontiac Grand Prix LJ
1978-1988 Pontiac Grand Prix Base
1984-1988 Pontiac Grand Prix LE
1988 Pontiac Grand Prix SE
1978-1981 Pontiac LeMans Base
1988 Pontiac LeMans Aerocoupe
1988 Pontiac LeMans Aerocoupe YL
1988 Pontiac LeMans Base
1988 Pontiac LeMans SE
1988 Pontiac LeMans Value Leader

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 Rear Frame Notching Kit for 78-88 GM G-Body

Achieve the aggressive stance and wider tire fitment you desire with the UMI Performance Rear Frame Notching Kit (P/N 3061). Specifically designed for the 1978-1988 GM G-Body platform (including Buick Regal, Chevrolet El Camino, Malibu, Monte Carlo, Oldsmobile Cutlass, and Pontiac LeMans/Grand Prix), this kit allows you to narrow the upper rear frame rails. This modification is essential for installing wider tires and achieving a lowered look without compromising suspension geometry.

Key Features and Benefits:

  • Wider Tire Clearance: Enables the fitment of wider rear tires for improved grip and aesthetics.
  • Precision Laser Cut: Manufactured from 1/8" premium steel with laser-cut precision to follow the frame contours accurately.
  • Easy Weld-In Design: Designed for straightforward welding with a standard MIG welder, featuring slight overhang for easy integration.
  • Includes End Enclosures: Comes with end caps to seamlessly bridge the notched section to the original frame.
  • Durable Construction: Built to withstand the demands of performance driving and street use.
  • Made in USA: Designed, manufactured, and tested in Philipsburg, PA.

Note: This kit requires cutting, welding, and general fabrication skills for proper installation. It's an ideal upgrade for custom builds, drag cars, or any G-Body owner looking to optimize tire fitment. Get your UMI Performance Rear Frame Notching Kit today at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1978-1982 Buick Regal Sport
1978-1987 Buick Regal Base
1978-1988 Buick Regal Limited
1982 Buick Regal Limited Turbo
1982-1983 Buick Regal Estate Wagon
1984-1987 Buick Regal Grand National
1987 Buick Regal GNX
1988 Buick Regal Custom
1978 Chevrolet El Camino Conquista
1978-1987 Chevrolet El Camino Base
1978-1987 Chevrolet El Camino SS
1979-1981 Chevrolet El Camino Royal Knight
1981-1986 Chevrolet El Camino Conquista
1978-1980 Chevrolet Malibu Classic Estate
1978-1981 Chevrolet Malibu Classic Landau
1978-1981 Chevrolet Malibu Base
1979 Chevrolet Malibu Landau
1979 Chevrolet Malibu Police
1979-1980 Chevrolet Malibu Classic Sport
1979-1980 Chevrolet Malibu Estate
1978 Chevrolet Monte Carlo Sport
1978-1981 Chevrolet Monte Carlo Landau
1979 Chevrolet Monte Carlo Base
1980 Chevrolet Monte Carlo Sport
1981-1988 Chevrolet Monte Carlo Base
1983 Chevrolet Monte Carlo CL
1986-1988 Chevrolet Monte Carlo LS
1978-1979 Oldsmobile Cutlass Vista Cruiser
1979 Oldsmobile Cutlass Vista Cruiser Brougham
1980 Oldsmobile Cutlass Base
1980-1981 Oldsmobile Cutlass Brougham
1980-1981 Oldsmobile Cutlass LS
1978-1980 Pontiac Grand Prix SJ
1978-1983 Pontiac Grand Prix LJ
1978-1988 Pontiac Grand Prix Base
1984-1988 Pontiac Grand Prix LE
1988 Pontiac Grand Prix SE
1978-1981 Pontiac LeMans Base
1988 Pontiac LeMans Aerocoupe
1988 Pontiac LeMans Aerocoupe YL
1988 Pontiac LeMans Base
1988 Pontiac LeMans SE
1988 Pontiac LeMans Value Leader

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