UMI Performance A204-450R Front Coilover Kit with 450lb Springs

The UMI Performance A204-450R is a complete front coilover kit that combines premium USA-made hybrid coil springs with Viking double-adjustable shocks for ultimate suspension performance and adjustability. This system allows ride height adjustment from factory height down to 3 inches of lowering without requiring spring compressors.

Key Features:

• 19-way adjustable compression and rebound damping (361 possible combinations) for precise tuning
• Includes two front coilover shocks, double adjustable, built and dyno tested in Lakeville, Minnesota
• 450lb spring rate ideal for small block street/cruise applications and big block drag racing
• Hybrid coil springs manufactured in USA with protective finish for long-lasting appearance
• Height adjustable from factory to 3" lowered using optional spanner wrench and thrust bearing kit
• Each shock is individually serialized and can be rebuilt at Viking or authorized centers
• Works with factory lower A-arms or UMI lower A-arms
• Pairs perfectly with UMI geometry-corrected upper A-arms for complete suspension upgrade

Spring Rate Options Available:

• 250lb: Drag race only with significant weight reduction (11" tall springs)
• 350lb: Small block cruise or drag race with lightening
• 450lb: Small block cruise, big block drag race (this kit)
• 550lb: Small block handling, all big blocks except drag

Optional Components:

• Spanner Wrench & Thrust Bearing Kit: Essential for easy height adjustments while shocks remain mounted. The thrust bearing reduces friction between spring and spring seat for smoother adjustments.
• Polyurethane Shock Mounts: Available for mild street applications for improved ride comfort. Bearing ends recommended for racing, auto-x, and high-performance applications.

The innovative design eliminates the need for coil spring compressors during installation. The upper coil fits your vehicle's factory upper spring perch while the lower coil matches the coilover shock bottom. Independent compression and rebound adjusters allow custom tuning for street driving, drag racing, autocross, and road racing—all with one shock assembly.