UMI Performance 64-66 GM A-Body Factory Height Rear Lowering Springs

SKU: UMI4048R
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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.

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UMI Performance Rear Lowering Springs for 1964-1966 GM A-Body

Elevate your classic muscle car's performance and aesthetics with UMI Performance's premium rear lowering springs, specifically designed for 1964-1966 GM A-Body vehicles. Engineered in collaboration with a leading Sprint Cup chassis engineer, these springs are crafted to deliver a superior driving experience, blending modern handling capabilities with the iconic muscle car appearance.

Key Features and Benefits:

  • Optimized Performance: Wound from high-quality 9254 CrSi premium wire, these springs feature a linear 130 lb/in rate. This consistent rate ensures predictable handling, ideal for autocross, Pro-Touring events, or spirited driving.
  • Enhanced Stability: The increased spring stiffness effectively reduces body roll and eliminates the common "floating" sensation found in stock A-body suspensions, providing a more planted and responsive feel.
  • Crisp Ride Quality: Experience a firmer, more controlled ride that enhances cornering ability without sacrificing comfort for daily driving or cruising.
  • Durable Construction: Built to last with a tough black powder coat finish, these springs are designed to withstand the rigors of performance driving.
  • Direct Fit: These rear springs are a direct replacement for your factory springs, ensuring a straightforward installation process for your 1964, 1965, or 1966 Buick Skylark, Special, Chevrolet Chevelle, El Camino, Oldsmobile 442, Cutlass, F85, or Pontiac GTO, LeMans.

Invest in your vehicle's handling prowess and visual appeal. These UMI Performance rear lowering springs are proudly manufactured in the USA, offering exceptional quality and performance for your classic A-body. Discover the difference superior suspension components can make at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1964-1966 Buick Skylark Base
1964-1966 Buick Special Base
1964-1966 Buick Special Deluxe
1964-1966 Chevrolet Chevelle Base
1964-1966 Chevrolet Chevelle SS
1965-1966 Chevrolet Chevelle Deluxe
1964-1966 Chevrolet El Camino Base
1964-1966 Oldsmobile 442 Base
1964-1966 Oldsmobile Cutlass Base
1964-1966 Oldsmobile Cutlass Holiday
1964-1966 Oldsmobile F85 Base
1964-1966 Oldsmobile F85 Deluxe
1966 Oldsmobile F85 Holiday
1964-1966 Pontiac GTO Base
1964-1966 Pontiac LeMans Base

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 Lowering Springs for 1964-1966 GM A-Body

Elevate your classic muscle car's performance and aesthetics with UMI Performance's premium rear lowering springs, specifically designed for 1964-1966 GM A-Body vehicles. Engineered in collaboration with a leading Sprint Cup chassis engineer, these springs are crafted to deliver a superior driving experience, blending modern handling capabilities with the iconic muscle car appearance.

Key Features and Benefits:

  • Optimized Performance: Wound from high-quality 9254 CrSi premium wire, these springs feature a linear 130 lb/in rate. This consistent rate ensures predictable handling, ideal for autocross, Pro-Touring events, or spirited driving.
  • Enhanced Stability: The increased spring stiffness effectively reduces body roll and eliminates the common "floating" sensation found in stock A-body suspensions, providing a more planted and responsive feel.
  • Crisp Ride Quality: Experience a firmer, more controlled ride that enhances cornering ability without sacrificing comfort for daily driving or cruising.
  • Durable Construction: Built to last with a tough black powder coat finish, these springs are designed to withstand the rigors of performance driving.
  • Direct Fit: These rear springs are a direct replacement for your factory springs, ensuring a straightforward installation process for your 1964, 1965, or 1966 Buick Skylark, Special, Chevrolet Chevelle, El Camino, Oldsmobile 442, Cutlass, F85, or Pontiac GTO, LeMans.

Invest in your vehicle's handling prowess and visual appeal. These UMI Performance rear lowering springs are proudly manufactured in the USA, offering exceptional quality and performance for your classic A-body. Discover the difference superior suspension components can make at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1964-1966 Buick Skylark Base
1964-1966 Buick Special Base
1964-1966 Buick Special Deluxe
1964-1966 Chevrolet Chevelle Base
1964-1966 Chevrolet Chevelle SS
1965-1966 Chevrolet Chevelle Deluxe
1964-1966 Chevrolet El Camino Base
1964-1966 Oldsmobile 442 Base
1964-1966 Oldsmobile Cutlass Base
1964-1966 Oldsmobile Cutlass Holiday
1964-1966 Oldsmobile F85 Base
1964-1966 Oldsmobile F85 Deluxe
1966 Oldsmobile F85 Holiday
1964-1966 Pontiac GTO Base
1964-1966 Pontiac LeMans Base

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 Lowering Springs for 1964-1966 GM A-Body

Elevate your classic muscle car's performance and aesthetics with UMI Performance's premium rear lowering springs, specifically designed for 1964-1966 GM A-Body vehicles. Engineered in collaboration with a leading Sprint Cup chassis engineer, these springs are crafted to deliver a superior driving experience, blending modern handling capabilities with the iconic muscle car appearance.

Key Features and Benefits:

  • Optimized Performance: Wound from high-quality 9254 CrSi premium wire, these springs feature a linear 130 lb/in rate. This consistent rate ensures predictable handling, ideal for autocross, Pro-Touring events, or spirited driving.
  • Enhanced Stability: The increased spring stiffness effectively reduces body roll and eliminates the common "floating" sensation found in stock A-body suspensions, providing a more planted and responsive feel.
  • Crisp Ride Quality: Experience a firmer, more controlled ride that enhances cornering ability without sacrificing comfort for daily driving or cruising.
  • Durable Construction: Built to last with a tough black powder coat finish, these springs are designed to withstand the rigors of performance driving.
  • Direct Fit: These rear springs are a direct replacement for your factory springs, ensuring a straightforward installation process for your 1964, 1965, or 1966 Buick Skylark, Special, Chevrolet Chevelle, El Camino, Oldsmobile 442, Cutlass, F85, or Pontiac GTO, LeMans.

Invest in your vehicle's handling prowess and visual appeal. These UMI Performance rear lowering springs are proudly manufactured in the USA, offering exceptional quality and performance for your classic A-body. Discover the difference superior suspension components can make at GGCRACING.

Vehicle Fitment

Years Make Model Trim
1964-1966 Buick Skylark Base
1964-1966 Buick Special Base
1964-1966 Buick Special Deluxe
1964-1966 Chevrolet Chevelle Base
1964-1966 Chevrolet Chevelle SS
1965-1966 Chevrolet Chevelle Deluxe
1964-1966 Chevrolet El Camino Base
1964-1966 Oldsmobile 442 Base
1964-1966 Oldsmobile Cutlass Base
1964-1966 Oldsmobile Cutlass Holiday
1964-1966 Oldsmobile F85 Base
1964-1966 Oldsmobile F85 Deluxe
1966 Oldsmobile F85 Holiday
1964-1966 Pontiac GTO Base
1964-1966 Pontiac LeMans Base

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