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 b...
UMI p/n 2661 1970-1981 Camaro and Firebird Extended Coilover Mount is used to mount a true racing coilover into the front of your 2nd Gen. This weld-in upper coilover mount kit locates a 2-½” racin...
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 performance with dec...
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 Made in USA of 5...
UMI’s P/N 2405 spring perch kit is used as an upper spring mount in conjunction with our 2400 series k-member. The 2405 spring perch kit is an economical way to convert from a coil over k-member P/...
UMI’s P/N 2405 spring perch kit is used as an upper spring mount in conjunction with our 2400 series k-member. The 2405 spring perch kit is an economical way to convert from a coil over k-member P/...
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...
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...
The UMI Performance weight jack kit for 1982-1992 GM F-Body is designed to give your classic muscle car a firm ride geared toward auto-x and road race with occasional street use. This race kit is s...
The UMI Performance weight jack kit for 1982-1992 GM F-Body is designed to give your classic muscle car a firm ride geared toward auto-x and road race with occasional street use. This race kit is s...
The UMI Performance weight jack kit for 1982-1992 Camaro and Firebird is designed to give your daily driver a medium-firm ride worthy of corner carving as well as auto-x and road race. This street/...
The UMI Performance weight jack kit for 1982-1992 Camaro and Firebird is designed to give your daily driver a medium-firm ride worthy of corner carving as well as auto-x and road race. This street/...
UMI’s performance lowering springs are built to lower the 4th Gen rear approx. 1.5” and increase the spring rates for a crisp handling experience. UMI rear lowering springs are Made in USA of 9254 ...
UMI’s performance lowering springs are built to lower the 4th Gen front end approx. 1.25” and increase the spring rates for a crisp handling experience. UMI front springs are Made in USA of 5160 Cr...
SPC Performance Pro Spring Kit offers immediate handling enhancement and gives your muscle car an aggressive stance! Front springs provide a 1.3" drop and rear springs 1.0" drop. Highest quality an...
SPC Performance Pro Spring Kit offers immediate handling enhancement and gives your muscle car an aggressive stance! Front springs provide a 1.3" drop and rear springs 1.0" drop. Highest quality an...
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