UMI’s leaf spring and poly shackle kit is a complete, high performance solution to lower the rear of your 2nd Gen. These springs feature high quality US Steel, multi-leaf construction and lower...

UMI’s 2nd Gen F-body lowering springs are wound from 5160 CrSi premium wire and feature a linear 600 lb/in rate. UMI’s front springs are stiffer than stock to provide increased...

UMI’s street front end kit includes everything to completely transform the front end of the 2nd Gen F-Body into a street friendly, corner capable, modern handling muscle car. The foundation is...

UMI’s street front end kit includes everything to completely transform the front end of the 2nd Gen F-Body into a street friendly, corner capable, modern handling muscle car. The foundation is...

UMI’s Stage 1 handling kit is the cost effective way to refresh your trusty 2nd Gen and bring the joy back to daily driving. The kit includes 2" UMI front lowering springs (600 lb/in rate) and...

UMI's rear weight jacks provide ride height adjustment and excellent handling for your 3rd or 4th Gen GM F-Body. The kit includes custom wound premium race quality springs and our own unique spring...

UMI's rear weight jacks provide ride height adjustment and excellent handling for your 3rd or 4th Gen GM F-Body. The kit includes custom wound premium race quality springs and our own unique spring...

Applications: 1970-1981 Chevrolet Camaro (all models) 1970-1981 Pontiac Firebird (all models) 1964-1972 Chevrolet Chevelle, Monte Carlo, Malibu, El Camino 1964-1972 Buick Skylark, Grand Sport,...

Applications: 1970-1981 Chevrolet Camaro (all models) 1970-1981 Pontiac Firebird (all models) 1964-1972 Chevrolet Chevelle, Monte Carlo, Malibu, El Camino 1964-1972 Buick Skylark, Grand Sport,...

UMI’s 2664 aluminum body mounts are a direct replacement for worn out factory body mounts and are used to restore the body location to factory position. These aluminum body mounts are great for...

UMI’s performance lowering springs are built to lower the 3rd Gen approx. 1” - 1.5” and increase the spring rates for a crisp handling experience and better stance. UMI springs are...

UMI’s heavy duty relocation brackets improve clearances around the steering system and struts by moving the mounting points slightly forward. Increased clearance allows for a greater variety of...