UMI Performance AB7250-1 Double Adjustable Coilover Lowering Kit with Viking Shocks

The UMI Performance AB7250-1 is a complete front and rear suspension lowering kit featuring four Viking double adjustable shocks hand-built in Lakeville, Minnesota. Combining a hybrid front coilover spring system with rear lowering springs, this bolt-in kit delivers a wide range of tuning flexibility for street cruising, drag racing, or corner carving — all without welding or a spring compressor.

What's Included:

• (2) Front coilover shocks, double adjustable
• (2) Rear shocks, double adjustable
• (2) Front springs — choice of 250, 350, 450, or 550 lb/in spring rate
• (2) Rear springs — choice of 1" or 2" rear drop

Front Spring Rate Guide:

• 250 lb: Drag race only — 11" tall springs, serious weight reduction required
• 350 lb: Small block cruise or drag race with weight reduction
• 450 lb: Small block street/cruise or big block drag race
• 550 lb: Small block performance handling, all big block applications except drag

Key Features:

• 0–3" front drop with easy height adjustment — no spring compressor needed
• 1" or 2" rear drop for a subtle or aggressive Pro-Tour stance
• 19 compression and 19 rebound settings on all four Viking shocks — independently adjustable with no tools required
• Lowered center of gravity improves handling and places the upper A-arm in a more favorable geometry angle
• Premium USA-made springs, shot-peened and coated for long-term durability
• True bolt-in installation — no welding, no spring compressor required

Baseline Shock Settings:

• All-around street: 6C / 8R
• Corner carving: 10C / 12R
• Strip (drag): 6C / 2R front, 6C / 6R rear

Optional Spanner Wrench & Thrust Bearing Kit: The optional spanner wrench allows front ride height adjustment while the shock remains mounted. The thrust bearing kit installs between the spring and spring seat, reducing friction for smoother, easier adjustments. While not required for installation, UMI strongly recommends using the thrust bearing kit when making height adjustments.

Whether you're building a weekend cruiser, a drag strip weapon, or a high-performance road course machine, the AB7250-1 gives you the adjustability to dial in exactly the ride height and handling balance you need.