UMI Performance GBF450-1 - 78-88 GM G-Body Spring/Shock Lowering Kit 1in Rear 450lb

UMI Performance GBF450-1 - 78-88 GM G-Body Spring/Shock Lowering Kit 1in Rear 450lb

UMI’s lowering kit includes Viking double adjustable shocks, 450 lb front coil-overs, and 1" or 2" rear lowering springs. Bolt-in design allows tool-free tuning for street or drag applications, offering firm handling and adjustable stance.

UMI’s lowering package includes four Viking double adjustable shocks, a hybrid front coil-over spring system with 450 lb front springs, and your choice of 1 or 2-inch UMI rear lowering springs. The 450 lb springs are recommended for small block cruising and big block drag racing, providing a firmer ride for improved handling and performance. The hybrid front coil-over system allows a 0–3" adjustable front drop, while the rear springs offer 1" or 2" lowering options to achieve the desired stance. Viking’s double adjustable shocks feature 19 compression and 19 rebound settings, enabling easy, tool-free tuning for street, strip, or corner-carving performance. The kit is fully bolt-in, requiring no welding or front spring compressor, and optional Spanner Wrench and Thrust Bearing Kits simplify height adjustments. This setup delivers a strong balance of ride quality and performance for both street and drag applications.

• 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
• 450lb, Small block cruise, big block drag race