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UMI Performance 64-72 GM A-Body 78-88 G-Body 1in Lowering Spring Rear

SKU: UMI4050R

64-72 GM A-Body 1in Rear Lowering Springs

UMI Lowering Springs

UMI Performance 64-72 GM A-Body 78-88 G-Body 1in Lowering Spring Rear

SKU: UMI4050R

64-72 GM A-Body 1in Rear Lowering Springs

UMI Lowering Springs

A$518.27
IN STOCK! Est Ship 3-5 days. This item is IN STOCK at one of our warehouses or distribution centres, the ETA is the approximate time required to prepare your order for dispatch.
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Description

A spring is a spring right? Wrong! When UMI chose to manufacture our own line of springs we went all out. Designed in conjunction with a leading Sprint Cup chassis engineer, these springs are the best in the business. These springs are wound from 9254 CrSi premium wire and feature a linear 130 lb/in rate. The linear rate provides consistent handling characteristics which are important for Auto-x and Pro-Tour applications while the increase in stiffness reduces body roll and prevents the “floating” feeling so common with the A-body. These springs are suitable for Auto-x and Pro-Tour applications as well as corner carving/cruising. They have a tough black powder coat finish and UMI proudly manufactures these premium quality springs in the USA. As an industry leader in the muscle car suspension industry, UMI is proud to bring you the best spring in the business. Consistent rates and only the best materials (premium Chrome Silicon wire) ensure your car sits properly for years to come. Linear spring rates (530 lb/in front, 130 lb/in rear) provides a firm yet comfortable ride and incredible handling. No more floating feeling. Suitable for Pro-Tour, Auto-x and general cruising.

Kit Options

This item is available as a full kit.
Select a kit option in the following table if you are looking for this item in a bundle form with all associated components.

Kit option/s:

Thumb SKU Kit Title
umiAB7250-1 UMI Performance 1967 GM A-Body Spring/Shock Lowering Kit 1in Rear 250lb (1x umiA205-250T, 1x umi4050R, 2x umiB220)
umiAB7350-1 UMI Performance 1967 GM A-Body Spring/Shock Lowering Kit 1in Rear 350lb (1x umiA205-350T, 1x umi4050R, 2x umiB220)
umiAB7450-1 UMI Performance 1967 GM A-Body Spring/Shock Lowering Kit 1in Rear 450lb (1x umiA205-450T, 1x umi4050R, 2x umiB220)
umiAB7550-1 UMI Performance 1967 GM A-Body Spring/Shock Lowering Kit 1in Rear 550lb (1x umiA205-550T, 1x umi4050R, 2x umiB220)
umiAB8350-1 UMI Performance 68-72 GM A-Body Spring/Shock Lowering Kit 1in Rear 350lb (1x umiA204-350S, 1x umi4050R, 2x umiB220)
umiAB8450-1 UMI Performance 68-72 GM A-Body Spring/Shock Lowering Kit 1in Rear 450lb (1x umiA204-450S, 1x umi4050R, 2x umiB220)
umiAB8550-1 UMI Performance 68-72 GM A-Body Spring/Shock Lowering Kit 1in Rear 550lb (1x umiA204-550S, 1x umi4050R, 2x umiB220)
umiGBF250-1 UMI Performance 78-88 GM G-Body Spring/Shock Lowering Kit 1in Rear 250lb (1x umiA204-250R, 1x umi4050R, 2x umiB220)
umiGBF350-1 UMI Performance 78-88 GM G-Body Spring/Shock Lowering Kit 1in Rear 350lb (1x umiA204-350R, 1x umi4050R, 2x umiB220)
umiGBF450-1 UMI Performance 78-88 GM G-Body Spring/Shock Lowering Kit 1in Rear 450lb (1x umiA204-450R, 1x umi4050R, 2x umiB220)
umiGBF550-1 UMI Performance 78-88 GM G-Body Spring/Shock Lowering Kit 1in Rear 550lb (1x umiA204-550R, 1x umi4050R, 2x umiB220)
umiSS103050 UMI Performance 68-72 GM A-Body Lowering Kit 1in Lowering (2x bil24-009294, 2x bil24-009492, 1x umi4050F, 1x umi4050R)
umiSS103050G UMI Performance 78-88 GM G-Body Spring/Shock Kit 1in Lowering (2x bil24-009294, 2x bil24-009492, 1x umi4050R, 1x umi3050F)
umiSS203050 UMI Performance 1967 GM A-Body Lowering Kit 1in Lowering (2x bil24-009294, 2x bil24-029728, 1x umi4050F, 1x umi4050R)
umiAB8250-1 UMI Performance 68-72 GM A-Body Spring/Shock Lowering Kit 1in Rear 250lb (1x umiA204-250S, 1x umi4050R, 2x umiB220)
umiABF801-1-B UMI Performance 68-72 GM A-Body Handling Kit 1in Lowering Stage 1 - Black (2x bil24-009294, 2x bil24-009492, 1x umi4050F, 1x umi4050R, 1x umi4034-B, 1x umi4035-B, 1x umi90044-B, 1x umi90035-B)
umiABF801-1-R UMI Performance 68-72 GM A-Body Handling Kit 1in Lowering Stage 1 - Red (2x bil24-009294, 2x bil24-009492, 1x umi4050F, 1x umi4050R, 1x umi4034-R, 1x umi4035-R, 1x umi88-413, 1x umi90035-R)
umiABF803-1-B UMI Performance 68-72 GM A-Body Handling Kit Stage 2 - Black (2x bil24-009294, 2x bil24-009492, 1x umi4015-B, 1x umi4016-B, 1x umi4031-B, 1x umi4033-1-B, 1x umi3000-B, 1x umi4028-B, 1x umi4001, 1x umi4004, 1x umi4050F, 1x umi4050R, 1x umi4034-B, 1x umi4035-B, 1x umi90035-B)

Part Type

64-72 GM A-Body 1in Rear Lowering Springs

Data: v4.2 - Upd: 2026-09-30 16:54:09

Specifications

Reference Information

Brand Name/s Umi Performance
StreetFX SKU umi4050R
SFX Item ID 4155953
Supplier Item Code 4155953
Manufacturer SKU 4050R
Manufacturer UPC N/A
Alternative References upi-4050r, 1in

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