UMI Performance manufactures its own line of springs, developed in conjunction with a leading Sprint Cup chassis engineer. These factory-height rear springs add modern handling and a crisp ride while keeping the stock muscle car appearance. They are wound from 9254 chromium-silicon premium wire with a linear 130 lb/in rate that provides consistent handling for autocross and Pro-Touring use as well as corner carving and general cruising, while the added stiffness reduces body roll and the floating feeling common to the A-body. They carry a tough black powder coat finish and UMI proudly manufactures these springs in the USA.
Specifications:
- Factory (stock) height rear coil springs
- Sold as a pair
- 9254 chromium-silicon premium wire
- Linear 130 lb/in spring rate
- Black powder coat finish
- Fits 1964-1966 GM A-body
- Made in the USA
- Part number: 4048R
Vehicle Applications:
- 1964 Buick Skylark
- 1965 Buick Skylark
- 1966 Buick Skylark
- 1964 Buick Special
- 1965 Buick Special
- 1966 Buick Special
- 1964 Chevrolet Chevelle
- 1965 Chevrolet Chevelle
- 1966 Chevrolet Chevelle
- 1964 Chevrolet El Camino
- 1965 Chevrolet El Camino
- 1966 Chevrolet El Camino
- 1964 Oldsmobile 442
- 1965 Oldsmobile 442
- 1966 Oldsmobile 442
- 1964 Oldsmobile Cutlass
- 1965 Oldsmobile Cutlass
- 1966 Oldsmobile Cutlass
- 1964 Oldsmobile F85
- 1965 Oldsmobile F85
- 1966 Oldsmobile F85
- 1964 Pontiac GTO
- 1965 Pontiac GTO
- 1966 Pontiac GTO
- 1964 Pontiac LeMans
- 1965 Pontiac LeMans
- 1966 Pontiac LeMans
FAQ
What vehicles do the UMI 4048R rear springs fit?
They fit 1964-1966 GM A-body cars, including the Chevrolet Chevelle and El Camino, Pontiac GTO and LeMans, Oldsmobile 442 and Cutlass, and Buick Skylark and Special. See the vehicle applications list for every year and model.
What is the spring rate?
The rear springs are wound from 9254 chromium-silicon premium wire and use a linear 130 lb/in rate for consistent handling.
Will these keep a factory ride height?
Yes. These are factory-height springs engineered to keep the stock muscle car appearance while adding modern handling and a crisp ride.
What are they good for?
The linear rate suits autocross and Pro-Touring driving as well as corner carving and general cruising, and the added stiffness reduces body roll and the floating feeling common to the A-body.
Are these springs made in the USA?
Yes. UMI Performance manufactures these springs in the USA.
