UMI Performance A224-550T Front Coilover Adjustable Spring Lowering Kit 550lb

The UMI Performance A224-550T is a front coilover kit built around a high-quality hybrid coil spring paired with a Viking 19-way double adjustable shock absorber. This kit delivers a versatile performance solution capable of handling street cruising, drag racing, auto-cross, and road racing — all from a single shock platform with 361 possible damping combinations.

Each shock is individually built, dyno tested, and serialized at Viking's facility in Lakeville, Minnesota. The hybrid coil spring is proudly Made in USA and features a brilliant protective finish engineered to resist corrosion and keep your springs looking great for years. Shocks can be rebuilt through Viking or an authorized Viking rebuild center for long-term serviceability.

Key Features:

• Two (2) front coilover shocks — 19-way double adjustable compression and rebound damping
• 361 possible damping combinations for precise, custom tuning
• Two (2) hybrid front coil springs — Made in USA
• This listing includes the 550 lb/in spring rate — suited for small block handling and all big block applications except drag racing
• Spring rate options also available: 250 lb (drag race only), 350 lb (small block cruise/drag), 450 lb (small block cruise / big block drag)
• Factory to 3 inches of ride height lowering adjustability — no coil spring compressor required
• Independent compression and rebound adjusters for street, strip, auto-x, and road race tuning
• Compatible with UMI lower control arms or factory lower control arms
• Brilliant protective finish for long-term spring durability

Mounting Options:

• Polyurethane bushings — recommended for mild street use; reduces harshness and improves ride comfort
• Bearing ends — recommended for drag racing, auto-x, and road race applications for maximum reliability and performance

Optional Accessories (sold separately):

• Spanner Wrench — required for ride height adjustment while the shock remains mounted to the vehicle
• Thrust Bearing Kit — placed between the spring and spring seat to allow smooth rotation during height adjustments; highly recommended but not required for installation

The upper coil is designed to seat on the vehicle's factory upper spring perch, while the lower section interfaces with the coilover shock body — simplifying installation without the need for a spring compressor. This kit pairs perfectly with UMI's geometry-corrected upper control arms loaded with a tall ball joint for maximum handling performance at the track, strip, or on the street.