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Description

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.

Fitment:
Buick Gran Sport Base 1967
Buick Skylark 350 1970
Buick Skylark 350 1972
Buick Skylark Base 1967
Buick Skylark Base 1968
Buick Skylark Base 1969
Buick Skylark Base 1970
Buick Skylark Base 1971
Buick Skylark Base 1972
Buick Skylark Custom 1968
Buick Skylark Custom 1969
Buick Skylark Custom 1970
Buick Skylark Custom 1971
Buick Skylark Custom 1972
Chevrolet Chevelle 300 1967
Chevrolet Chevelle 300 1968
Chevrolet Chevelle 300 Deluxe 1967
Chevrolet Chevelle 300 Deluxe 1968
Chevrolet Chevelle 300 Deluxe 1969
Chevrolet Chevelle Base 1967
Chevrolet Chevelle Base 1968
Chevrolet Chevelle Base 1970
Chevrolet Chevelle Base 1971
Chevrolet Chevelle Base 1972
Chevrolet Chevelle Concours 1967
Chevrolet Chevelle Concours 1968
Chevrolet Chevelle Concours 1969
Chevrolet Chevelle Concours 1970
Chevrolet Chevelle Concours 1971
Chevrolet Chevelle Concours 1972
Chevrolet Chevelle Concours Estate 1969
Chevrolet Chevelle Concours Estate 1970
Chevrolet Chevelle Concours Estate 1971
Chevrolet Chevelle Concours Estate 1972
Chevrolet Chevelle Deluxe 1967
Chevrolet Chevelle Greenbrier 1969
Chevrolet Chevelle Greenbrier 1970
Chevrolet Chevelle Greenbrier 1971
Chevrolet Chevelle Greenbrier 1972
Chevrolet Chevelle Malibu 1968
Chevrolet Chevelle Malibu 1969
Chevrolet Chevelle Malibu 1970
Chevrolet Chevelle Malibu 1971
Chevrolet Chevelle Malibu 1972
Chevrolet Chevelle Nomad 1968
Chevrolet Chevelle Nomad 1969
Chevrolet Chevelle Nomad 1970
Chevrolet Chevelle Nomad 1971
Chevrolet Chevelle Nomad 1972
Chevrolet Chevelle SS 1967
Chevrolet Chevelle SS 1968
Chevrolet Chevelle SS 1969
Chevrolet Chevelle SS 1970
Chevrolet Chevelle SS 1971
Chevrolet Chevelle SS 1972
Chevrolet El Camino Base 1967
Chevrolet El Camino Base 1968
Chevrolet El Camino Base 1969
Chevrolet El Camino Base 1970
Chevrolet El Camino Base 1971
Chevrolet El Camino Base 1972
Chevrolet El Camino Custom 1968
Chevrolet El Camino Custom 1969
Chevrolet El Camino Custom 1970
Chevrolet El Camino Custom 1971
Chevrolet El Camino Custom 1972
Chevrolet El Camino SS 1968
Chevrolet El Camino SS 1969
Chevrolet El Camino SS 1970
Chevrolet El Camino SS 1971
Chevrolet El Camino SS 1972
Chevrolet Malibu Base 1967
Chevrolet Monte Carlo Base 1970
Chevrolet Monte Carlo Base 1971
Chevrolet Monte Carlo Base 1972
Oldsmobile 442 Base 1967
Oldsmobile 442 Base 1968
Oldsmobile 442 Base 1969
Oldsmobile 442 Base 1970
Oldsmobile 442 Base 1971
Oldsmobile Cutlass Base 1967
Oldsmobile Cutlass Base 1968
Oldsmobile Cutlass Base 1969
Oldsmobile Cutlass Base 1970
Oldsmobile Cutlass Base 1971
Oldsmobile Cutlass Base 1972
Oldsmobile Cutlass Cruiser 1972
Oldsmobile Cutlass Holiday 1967
Oldsmobile Cutlass S 1968
Oldsmobile Cutlass S 1971
Oldsmobile Cutlass S 1972
Oldsmobile Cutlass Turnpike Cruiser 1967
Oldsmobile F85 Base 1967
Oldsmobile F85 Base 1968
Oldsmobile F85 Base 1969
Oldsmobile F85 Base 1970
Oldsmobile F85 Base 1971
Oldsmobile F85 Base 1972
Pontiac Grand Prix Base 1967
Pontiac Grand Prix Base 1968
Pontiac Grand Prix Base 1969
Pontiac Grand Prix Base 1970
Pontiac Grand Prix Base 1971
Pontiac Grand Prix Base 1972
Pontiac GTO Base 1967
Pontiac GTO Base 1968
Pontiac GTO Base 1969
Pontiac GTO Base 1970
Pontiac GTO Base 1971
Pontiac GTO Base 1972
Pontiac GTO The Judge 1970
Pontiac GTO The Judge 1971
Pontiac Tempest Base 1967
Pontiac Tempest Base 1968
Pontiac Tempest Base 1969
Pontiac Tempest Base 1970
Pontiac Tempest Custom 1967
Pontiac Tempest Custom 1968
Pontiac Tempest Custom 1969
Pontiac Tempest GT 1970
Pontiac Tempest Safari 1967
Pontiac Tempest Safari 1968
Pontiac Tempest Safari 1969