UMI Performance A205-650R Viking Front Coilover Kit Double Adjustable 650lb Spring Poly Mount

The UMI Performance A205-650R is a front coilover kit pairing a high-quality USA-made hybrid coil spring with a Viking 19-position double adjustable shock absorber. Designed for serious performance street driving, autocross, and road racing, this kit delivers precise, independent control over compression and rebound damping — all in a single shock.

Each shock is individually built, dyno tested, and serialized at Viking Performance's facility in Lakeville, Minnesota, and can be rebuilt at Viking or an authorized Viking rebuild center for long-term serviceability. The lower shock mount uses polyurethane bushings, suitable for mild street and cruise applications.

Kit Includes:

• (2) Front coilover shocks, Viking double adjustable
• (2) Front hybrid coil springs — 650 lb/in spring rate

Key Features:

• 19-way independent compression and rebound adjustment — 361 possible damping combinations for tuning across street, strip, autocross, and road race
• USA-made hybrid coil spring with a brilliant protective finish for long-term durability
• No spring compressor required — the height adjuster acts as the compressor for straightforward installation and adjustment
• Ride height adjustable from factory height to 3 inches of lowering using the optional spanner wrench and thrust bearing kit
• Bearing-mounted bottom for increased reliability and performance in demanding applications
• Compatible with UMI's lower control arm or the factory lower control arm
• Every shock is built, dyno tested, and serialized in Lakeville, Minnesota
• Rebuildable at Viking or an authorized Viking rebuild center

650 lb Spring Rate Application Guide:

• 250 lb — Drag race only; serious weight reduction required (11" tall spring)
• 350 lb — Small block street cruise or drag race with weight reduction
• 450 lb — Small block street cruise or big block drag race
• 550 lb — Small block handling; all big blocks except drag (allows up to 2" lowering)
• 650 lb — Small block and big block handling, autocross (allows up to 2" lowering)

Optional Accessories (sold separately):

• Spanner Wrench — Used to adjust vehicle ride height while the shock remains mounted
• Thrust Bearing Kit — Placed between the spring and spring seat to allow the seat to rotate on a bearing, making height adjustments significantly easier. Highly recommended but not required for installation

Polyurethane Shock Mount Note: Polyurethane lower mounts are well-suited for mild street and cruise use. For autocross, drag racing, and road racing, bearing-end mounts are recommended for maximum reliability and performance. As with all performance suspension components, these parts may feel and sound different from factory rubber-mounted parts. UMI Performance is not responsible for polyurethane bushing damage resulting from use in high-performance applications.

For best handling results, pair this coilover kit with UMI's geometry-corrected upper control arm loaded with a tall ball joint.