UMI Performance manufactures this rear spring line in-house, developed in conjunction with a leading Sprint Cup chassis engineer. The 4052R rear springs are wound from 9254 chrome silicon premium wire and carry a linear 130 lb/in rate. The linear rate delivers consistent handling for Auto-x and Pro-Touring use, while the added stiffness reduces body roll and eliminates the floating feeling common to the early A-body. They give a 1 inch rear drop and suit Auto-x, Pro-Touring, corner carving, and cruising. They carry a durable black powder coat finish and are made in the USA.
Specifications:
- Position: Rear
- Lowering: 1 inch drop
- Spring rate: 130 lb/in linear
- Wire: 9254 chrome silicon
- Material: Steel
- Finish: Black powder coat
- Sold as: Pair
- Made in the USA
- Part number: 4052R
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 these rear springs fit?
The 4052R rear springs fit 1964 to 1966 GM A-Body models including the Chevrolet Chevelle and El Camino, Buick Skylark and Special, Oldsmobile Cutlass, 442 and F85, and Pontiac GTO and LeMans. See the Vehicle Applications list for the full year by model breakdown.
How much do these springs lower the rear of the car?
These rear springs are engineered for a 1 inch drop on the 1964 to 1966 A-body chassis.
Are these sold as a pair?
Yes. The 4052R is sold as a pair of rear springs.
What is the spring rate and material?
The rear springs use a linear 130 lb/in rate and are wound from 9254 chrome silicon premium wire with a black powder coat finish.
