1978-1988 GM G-Body UMI Shock and Spring Kit, 1” Lowering

1978 - 1988 Chevrolet Monte Carlo, Malibu, El Camino
1978 - 1988 Buick Regal, Grand National
1978 - 1988 Pontiac Grand Prix, LeMans
1978 - 1988 Oldsmobile Cutlass


The UMI Performance spring and shock kit is designed to lower your car 1 while providing a huge improvement in handling and control. These kits feature our race quality lowering springs which provide a high performance foundation for your ride. Premium US sourced CrSi wire is wound into the correct rates for street cruising, Pro-Touring, corner carving or light drag use. The UMI Performance monotube shock features medium-firm compression valving and a ramped up rebound curve to properly control the UMI spring. The rebound valving also controls body roll when cornering and contributes to a high performance ride.


Springs: Springs intended for small block engine. Lightweight LS may require trimming and an additional 1/4" front end drop may occur with a full weight big block. 


  • Springs feature 600 lb/in front rates and 130 lb/in linear rate.

  • Premium CrSi US sourced wire used on all lowering springs.

  • Shocks feature race proven construction for durability.

  • Nitrogen charged monotube shock for great control.

  • Comfortable yet performance oriented compression valving.

  • Ramped up rebound valving.

  • Complete kit Made in the USA.

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  • Part #: SS103050G
  • Manufactured by: UMI Performance Inc.
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