UMI Performance A207-550T Front Coilover Double Adjustable Lowering Kit Spring Rate - 550lb

The UMI Performance A207-550T is a front coilover adjustable spring lowering kit designed for performance street, drag, auto-cross, and road race applications. Built in partnership with Viking Performance, this kit pairs a high-quality hybrid coil spring (Made in USA) with a double adjustable shock absorber for maximum versatility and tuning flexibility.

Key Features:

• 19-way independent compression and rebound damping — 361 total possible tuning combinations to suit any driving style or application
• 550 lb front spring rate — optimized for big block vehicle configurations
• Hybrid coil spring design — upper coil fits the factory upper spring perch while the lower section integrates with the coilover shock body; no coil spring compressor required during installation
• Allows factory to 3-inch ride height reduction using the threaded adjuster collar
• Every shock is individually built, dyno tested, and serialized at Viking's facility in Lakeville, Minnesota
• Brilliant protective finish on all springs for long-lasting appearance and corrosion resistance
• Compatible with UMI's lower control arms as well as factory lower control arms
• Shocks are rebuildable at Viking Performance or any authorized Viking rebuild center

Mounting Options:

• Polyurethane lower shock mounts — recommended for mild street use; provides ride comfort and reduced NVH compared to bearing ends
• Bearing end lower mounts (available separately) — recommended for drag racing, auto-cross, and road race applications for increased durability and precision

Optional Accessories (sold separately):

• Spanner Wrench — used to adjust ride height while the shock remains mounted to the vehicle; required for height adjustments
• Thrust Bearing Kit — placed between the spring and the spring seat to allow easier ride height adjustments by reducing friction during rotation; strongly recommended but not required for installation

For best results, pair this coilover kit with UMI's geometry-corrected upper control arm loaded with a tall ball joint to maximize suspension geometry improvement at the track or on the street.