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 best in the business. Our springs are wound from 5160 CrSi premium wire and feature a linear 530 lb/in rate. The 4050F’s are stiffer than stock to provide increased performance with decreased body roll and a lower center of gravity. These springs are suitable for Auto-x and Pro-Tour applications as well as corner carving/cruising. The ride height is engineered for a 1” lowering with standard SBC, aluminum head and intake Big Block and Pontiac 400 as well as LS power (lightened cars may require spring trimming). The 4050F’s are also suitable for full weight Big Block applications when nose down rake is desired. They have a tough black powder coat finish and UMI proudly manufactures these premium quality springs in the USA.

This Part Fits:

Year	Make	Model	Submodel
1967	Buick	Gran Sport	Base
1970,1972	Buick	Skylark	350
1967-1972	Buick	Skylark	Base
1968-1972	Buick	Skylark	Custom
1967-1968	Chevrolet	Chevelle	300
1967-1969	Chevrolet	Chevelle	300 Deluxe
1970-1972	Chevrolet	Chevelle	Base
1967-1972	Chevrolet	Chevelle	Concours
1969-1972	Chevrolet	Chevelle	Concours Estate
1969-1972	Chevrolet	Chevelle	Greenbrier
1971-1972	Chevrolet	Chevelle	Heavy Chevy
1967-1972	Chevrolet	Chevelle	Malibu
1968-1972	Chevrolet	Chevelle	Nomad
1968	Chevrolet	Chevelle	Nomad Custom
1971-1972	Chevrolet	Chevelle	SS
1967-1970	Chevrolet	Chevelle	SS 396
1970	Chevrolet	Chevelle	SS 454
1967-1972	Chevrolet	El Camino	Base
1968-1972	Chevrolet	El Camino	Custom
1968-1972	Chevrolet	El Camino	SS
1970-1972	Chevrolet	Monte Carlo	Base
1967-1971	Oldsmobile	442	Base
1967-1972	Oldsmobile	Cutlass	Base
1972	Oldsmobile	Cutlass	Cruiser
1967	Oldsmobile	Cutlass	Holiday
1968,1971-1972	Oldsmobile	Cutlass	S
1967	Oldsmobile	Cutlass	Turnpike Cruiser
1967-1972	Oldsmobile	F85	Base
1967-1972	Pontiac	Grand Prix	Base
1967-1972	Pontiac	GTO	Base
1970-1971	Pontiac	GTO	The Judge
1967-1970	Pontiac	Tempest	Base
1967-1969	Pontiac	Tempest	Custom
1970	Pontiac	Tempest	GT
1967-1969	Pontiac	Tempest	Safari