UMI Performance 78-88 GM G-Body Spring/Shock Lowering Kit 1in Rear 550lb - GBF550-1

UMI’s lowering package includes four Viking double adjustable shocks, a hybrid front coil-over spring system with 550 lb front springs, and your choice of 1 or 2-inch UMI rear lowering springs. The 550 lb springs are ideal for small block handling and all big block applications except for drag racing, providing a firm, performance-oriented ride with excellent control. The hybrid front coil-over system allows a 0–3" adjustable front drop, while the rear springs offer 1" or 2" lowering options to fine-tune stance and appearance. Viking’s double adjustable shocks provide 19 compression and 19 rebound settings, allowing quick, tool-free adjustments for street, strip, or precise cornering performance. The kit is fully bolt-in, requiring no welding or front spring compressor, and optional Spanner Wrench and Thrust Bearing Kits make height adjustments easier. This setup delivers maximum handling and stability for high-performance street and track vehicles.

Features

• 0-3" lowering range up front, 1 or 2 inch choice for the rear
• Lower ride height improves handling by lowering center of gravity
• Lower ride height improves handling by placing the upper a-arm in a more favorable angle
• Viking features Premium quality Made In USA springs, shot peened and coated for durability
• Easy front height adjustment with optional Torrington bearings and wrench
• Shocks hand built in Lakeville, Minnesota
• Double adjustable features 19 independent compression and rebound settings (for a total of 361 possible combinations)
• Tune for street, strip or corner carving at the turn of a knob
• no tools required
• Baseline shock settings
• 6C,8R all around street, 10C,12R all around corner carving, 6C,2R front and 6C,6R rear strip
• Bolt in kit, no welding required. And best of all, no spring compressor required up front
• Front coil over shocks, double adjustable
• Rear shocks, double adjustable
• Front springs with choice of 250, 350, 450 or 550 spring rate
• Rear springs with choice of 1" or 2" rear drop
• Spanner wrench tool is used to adjust vehicle height while shock stays mounted
• Thrust bearing kit designed for easier adjustments but not needed for installation
• 550lb, Small block handling, all big blocks except drag

Application

• UMI designed GBF550 to fit 1978-1988 GM G-Body vehicles