UMI Performance A205-650T Viking Front Coilover Kit Double Adjustable Poly 650lb

The UMI Performance A205-650T is a Viking Performance front coilover kit designed for GM A-Body and B-Body applications. This kit pairs a high-quality USA-made hybrid coil spring with a 19-position double adjustable shock absorber, delivering a highly tunable suspension solution for street, strip, autocross, and road race use. The 650lb spring rate in this configuration is suited for big block B-Body applications.

The coilover design eliminates the need for a coil spring compressor during installation — the height adjuster serves as the compressor. With the optional spanner wrench and thrust bearing kit, ride height can be dialed in from stock height to up to 3 inches of lowering while the shock remains mounted. The shock features fully independent compression and rebound adjusters, providing 361 possible damping combinations to suit virtually any driving application.

Every Viking shock is individually built, dyno tested, and serialized at the Viking Performance facility in Lakeville, Minnesota. Shocks are fully rebuildable through Viking or an authorized Viking rebuild center.

Spring Rate Options Available (A205-T Series):

64–67 GM A-Body Front:

• 250 lb – 11" tall springs for drag race only; serious weight reduction required
• 350 lb – Small block street cruise or drag race; weight reduction recommended
• 450 lb – Small block street/cruise or big block drag race
• 550 lb – Small block handling or all big blocks except drag

65–70 GM B-Body Front:

• 550 lb – Small block applications
• 650 lb – Big block applications (this kit)

Kit Includes:

• (2) Front coilover shocks — double adjustable, 19-position compression and rebound
• (2) Front hybrid coil springs (650 lb rate)
• Spanner wrench and thrust bearing kit for easy ride height adjustment

Shock Mount Type — Polyurethane: The polyurethane lower shock mount is well-suited for mild street applications, offering ride comfort and reduced harshness. For more aggressive use such as corner carving, drag racing, autocross, or road racing, bearing-end mounts are recommended for increased reliability and precision. Note: Performance shock mounts, whether polyurethane or bearing, may feel and sound different from OEM rubber-mounted components.

Viking coilovers are compatible with UMI's performance lower A-arms or your factory lower A-arm. For maximum handling performance, pair this kit with UMI's geometry-corrected upper A-arm equipped with a tall ball joint. All springs and shocks are made in the USA.