UMI Performance A224-450S Adjustable Front Coilover Kit with 450lb Springs

The UMI Performance A224-450S is a complete front coilover conversion kit designed for GM A-Body and similar vehicles seeking adjustable ride height and advanced suspension tuning. This kit combines Viking double-adjustable shocks with USA-made hybrid coil springs, delivering performance suitable for street cruising, drag racing, or road course use.

Kit Includes:

• (2) Viking double-adjustable coilover shocks with bearing-mounted lower attachment points
• (2) 450lb rate front coil springs (11" tall)
• 19-way adjustable compression and rebound damping (361 possible combinations)
• Adjustable ride height capability from factory height to 3" lowered
• Protective finish on springs for long-term durability

Key Features:

• Each shock is individually built, dyno-tested, and serialized in Lakeville, Minnesota
• Bearing-mounted lower attachment points provide increased reliability and performance over polyurethane
• Independent compression and rebound adjusters allow custom tuning for any application
• No coil spring compressor required for installation—adjuster acts as compressor
• Shocks are rebuildable at Viking or authorized Viking rebuild centers
• Compatible with UMI lower A-arms or factory lower A-arms

450lb Spring Rate: Ideal for small block engines with street cruising or big block engines in drag race applications. This is the most versatile spring rate option for balanced street and strip performance.

Installation Notes: A spanner wrench tool is required to adjust vehicle height while shocks remain mounted. Optional thrust bearing kit is strongly recommended for easier height adjustments, allowing the spring seat to rotate on bearings rather than binding against the spring. Works perfectly with UMI's geometry-corrected upper A-arms loaded with tall ball joints.

This coilover system eliminates the need for multiple shock setups—one kit handles daily driving, weekend cruising, quarter-mile passes, and autocross events with simple adjuster changes.