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

Black powder coated finish

Will Not Trip An Engine Code

This complete SWR Meter Kit includes a compact SWR-power meter and cables (as shown) for easy connectivity and testing

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