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UMI Performance · New

UMI Performance 78-88 GM G-Body Spring/Shock Kit 1in Lowering

Name: UMI Performance 78-88 GM G-Body Spring/Shock Kit 1in Lowering
Brand: UMI Performance
SKU: umiSS103050G
Price: 665.99 USD

MPN SS103050G · Store SKU umiSS103050G

$665.99

CHECK AVAILABILITY0 in supplier warehouses. Ask JuiceBuilt about availability.

Supplier stock checked 11/8/2026, 6:58:12 AM UTC. Adding a part does not reserve it.

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Request a return within 30 calendar days after delivery. New parts must be unopened and unused.

Shipping & returns ↗This policy does not limit rights required by law.

Free standard shipping on eligible parts orders of $100 or more. Oversized and freight items excluded. Fitment, taxes, availability and final totals are confirmed before payment.

Product details

The UMI Performance spring and shock kit is designed to lower your car 1 while providing a huge improvement in handling and control. These kits feature our race quality lowering springs which provide a high performance foundation for your ride. Premium US sourced CrSi wire is wound into the correct rates for street cruising, Pro-Touring, corner carving or light drag use. The UMI Performance monotube shock features medium-firm compression valving and a ramped up rebound curve to properly control the UMI spring. The rebound valving also controls body roll when cornering and contributes to a high performance ride. Springs: Springs intended for small block engine. Lightweight LS may require trimming and an additional 1/4" front end drop may occur with a full weight big block. SS103050G - 1978-1988 GM G-Body UMI Shock and Spring Kit, 1” Lowering Springs feature 600 lb/in front rates and 130 lb/in linear rate. Premium CrSi US sourced wire used on all lowering springs. Comfortable yet performance oriented compression valving. Shocks feature race proven construction for durability. Nitrogen charged monotube shock for great control. Complete kit Made in the USA. Ramped up rebound valving.

Manufacturer fitment & guides

Check SS103050G against the manufacturer’s application information below.

A manufacturer application guide is not available for this listing. Request the exact application from JuiceBuilt before payment.

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What is the return policy?

Request a return within 30 calendar days after delivery. New parts must be unopened and unused.

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This policy does not limit rights required by law.

UMI Performance 78-88 GM G-Body Spring/Shock Kit 1in Lowering

Product details

Manufacturer fitment & guides

THE NEXT PART
OF YOUR BUILD.

Free shipping on $100+ orders.

Build with the right brands.

Shop your platform.

Shop by parts section.

Find your next upgrade.

Make the whole setup work.

A few things to know.

Your cart.

Freight & oversized shipping quote

Delivery address