UMI Performance 4050R Rear Lowering Springs 1in Drop 64-72 GM A-Body 78-88G-Body

Regular price: $182.95
Regular price: ~~$189.99~~
Sale price: $182.95

Shipping calculated at checkout.

In Stock: 8

Orders by 1pm PST ship same business day

Free Shipping w/3-4 Day Delivery

Authorized Dealer

Fitment Guarantee

30-Day Hassle Free Returns

Product Specification:

SKU:UMI4050R

MPN: 4050R

UPC: 4050R

Weight: 16.7 lb

Inventory: 8

Type: Lowering Springs

Vehicle Fitment

1964-1972 Chevrolet Chevelle, El Camino, Monte Carlo, Malibu (GM A-Body)
1964-1972 Buick Skylark, Gran Sport, Special, Sportwagon (GM A-Body)
1964-1972 Pontiac GTO, LeMans, Tempest, Grand Prix (GM A-Body)
1964-1972 Oldsmobile Cutlass, 442, F-85, Vista Cruiser (GM A-Body)
1971-1972 GMC Sprint (GM A-Body)
1978-1987 Buick Regal, Grand National (GM G-Body)
1978-1987 Chevrolet El Camino (GM G-Body)
1978-1983 Chevrolet Malibu (GM G-Body)
1978-1988 Chevrolet Monte Carlo (GM G-Body)
1978-1987 GMC Caballero (GM G-Body)
1978-1988 Oldsmobile Cutlass (GM G-Body)
1982-1986 Pontiac Bonneville (GM G-Body)
1978-1987 Pontiac Grand Prix, LeMans (GM G-Body)

Fitment Notes

Rear springs only - sold as a pair. Front lowering springs sold separately.
Designed for stock rear suspension geometry; not intended for vehicles with aftermarket rear end housings without proper modification.
Manufactured in the USA.

Features

Wound from 9254 chrome silicon (CrSi) premium wire for consistent rate retention and long-term durability.
Linear 130 lb/in rear spring rate delivers a firm yet comfortable ride with predictable, consistent handling characteristics.
Lowers the rear ride height approximately 1 in. to reduce body roll and improve stance.
Eliminates the "floating" feeling common to stock GM A-Body and G-Body suspensions.
Designed in conjunction with a NASCAR Sprint Cup chassis engineer for race-proven performance.
Suited for Pro-Tour, Autocross, corner carving, and general street cruising.
Black powder-coat finish for corrosion resistance and a clean, factory-style appearance.
Backed by a 2-Year Limited Warranty; manufactured in the USA.

Specifications

Position: Rear
Spring Rate: 130 lb/in (linear)
Drop Height: 1 in. (approximate)
Wire Material: 9254 Chrome Silicon (CrSi)
Finish: Black Powder-Coat
Spring Type: Coil
Quantity: Sold as a pair
Warranty: 2-Year Limited
Made in the USA

Included Components

2x UMI Performance 4050R - Rear Lowering Coil Springs (1 pair)

Product Description

The UMI Performance 4050R is a set of rear lowering springs engineered specifically for 1964-1972 GM A-Body and 1978-1988 GM G-Body platforms. Wound from 9254 chrome silicon wire and rated at a linear 130 lb/in, these springs deliver a predictable, consistent handling response that makes them ideal for Pro-Tour builds, Autocross competition, and spirited street driving. The 1 in. drop tightens up the rear stance, reduces body roll, and eliminates the soft, floating sensation that stock springs produce on these platforms.

Developed with input from a NASCAR Sprint Cup chassis engineer, the 4050R is designed to work within the factory suspension geometry for a straightforward installation requiring no modifications. The black powder-coat finish resists corrosion and holds up to long-term use in all conditions. UMI manufactures these springs in the USA and backs them with a 2-Year Limited Warranty, reflecting the quality of materials and construction that goes into every set.