UMI Performance 1978-1988 GM G-Body Rear Coilover Kit, Control Arm Relocation, 2S-3S Lowering

Part Number: UMI3048-110

UMI Performance 1978-1988 GM G-Body Rear Coilover Kit, Control Arm Relocation, 2S-3S Lowering

Part Number: UMI3048-110

$1,069.95

In Stock

( Inventory updated: 06/06/2026 )

Estimated ship date: 2-3 business days

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1978-1988 GM G-Body Rear Coilover Kit, Control Arm Relocation, 2S-3S Lowering

  • 1978-1988 GM G-Body Rear Coilover Kit, Control Arm Relocation, 2?-3? Lowering
  • Adjustable height lower mounting bracket allows shock travel tuning and additional ride height tuning.
  • Available in 110lb or 150lb spring rates.
  • Bolt in design mounts to factory rear end housings.
  • Brackets feature 3-position control arm mounting for tuning instant center.
  • Brackets manufactured entirely from 3/16? Made In USA mild steel.
  • Designed for 2? ? 3? lowering.
  • Designed, tested, manufactured and raced in Philipsburg, PA-USA
  • Included Viking Warrior double adjustable shocks offer 19 compression and 19 rebound adjustments.
  • Installation & Fitment Note: Coilover brackets are designed to fit factory rear end housings ONLY and may not fit aftermarket rear ends. Coilover kit P/N 3049 offers more clearance and options for aftermarket rear ends than P/N 3048. Rear shocks may not clear all exhaust tail pipes. UMI is not responsible for exhaust clearance issues. Coilover kit PNs 3049 and 3048 are designed for 2?-3? lowering. For 1? lowering, factory height and raised vehicles please use PN 3064 or 3065.
  • Key Features:
  • Optional shock tower reinforcement brace available. (P/N 3055)
  • Powder coated for a long lasting finish.
  • UMI?s bolt-in rear coilover kit allows full ride height, spring rate and damping adjustability for your 1978-1988 GM G-Body. The upper mount reinforcement is a direct bolt-in and holds a true 2-?? racing coilover with T-Bar. The FEA designed lower bracket bolts in using the standard trailing arm mounting hole as well as an additional reinforcement hole normally used by the standard rear shock. The lower bracket features a multi-position design to allow further fine tuning of ride height and shock location (???). The Viking shock is 19-way adjustable in both compression and rebound and ensures the perfect setting for every application. The 2-?? coilover springs are available in 14? 110lb for drag and street use and 12? 150lb for street and handling use. In addition to shock location adjustability, the UMI 3048 kit features three positions of trailing arm location adjustment to fine tune instant center. This adjustment is popular on lowered cars, for drag racing traction, or whenever a geometry change is desired. There is no cutting required and your car can be returned to stock at any time. 100% designed, manufactured and raced out of Philipsburg, PA-USA and always US materials.

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UMI Performance

UMI Performance was founded in 2002 as a father/son business developing performance parts for GM and Ford products. They quickly began to focus on suspension upgrades for both older and late model muscle cars, and have become a leader in replacement and high-performance suspension components, from individual parts to entire kits.

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