UMI Performance 2" Lowering Suspension Spring Kit 4 Springs BlackGM G-Body 1978-88 - Kit Valve Spring Compressor They utilize the best features

They utilize the best features from Holley's Race Bred 4150 HP(TM) carbs

We bring GPS navigation and wearable technology to the automotive

A foot-operated pedal controls the rotation of the tire

Designed with a full flow radius transition from port opening to AN 37

Rugged Ridge All-Terrain Door Entry Guards are molded of durable

UMI Performance 2" Lowering Suspension Spring Kit 4 Springs BlackGM G-Body 1978-88 - Kit Valve Spring Compressor They utilize the best featuresA 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. Our front springs are wound from 5160 CrSi premium wire and feature a linear 600 lb in rate. The rear springs are wound from 9254 CrSi premium wire and feature a linear 130 lb in rate. The linear rate provides consistent handling