UMI Performance A205-450R Viking Front Coilover Kit Double Adjustable Poly Spring - 450lb

The UMI Performance A205-450R is a front coilover kit built around a Viking Performance double adjustable shock paired with a USA-made hybrid coil spring rated at 450 lbs. Designed for small block cruise and big block drag race applications, this kit delivers a highly tunable suspension solution that suits street driving, strip performance, and auto-cross use — all in one package. The shocks are built, dyno tested, and serialized at Viking's facility in Lakeville, Minnesota.

Key Features:

• Includes (2) front coilover shocks — double adjustable compression and rebound
• 19-position independent compression and rebound adjustment (361 possible damping combinations)
• Includes (2) USA-made hybrid coil springs at 450 lb spring rate
• Polyurethane lower mount for street and mild performance applications
• Bearing-mounted lower option available separately for enhanced reliability in demanding use
• No coil spring compressor required — the height adjuster functions as the compressor
• Adjustable ride height from factory height to 3 inches of lowering
• Compatible with UMI's lower A-arm or factory lower A-arm
• Shocks are rebuildable at Viking or an authorized Viking rebuild center
• Protective finish keeps springs looking clean for years

Spring Rate Selection Guide:

• 250 lb: 11" tall spring — drag race only, serious weight reduction required
• 350 lb: Small block cruise or drag race with weight reduction
• 450 lb: Small block cruise, 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 — required for height adjustments
• Thrust Bearing Kit: Placed between the spring and spring seat for smoother, easier height adjustments; highly recommended but not required for installation

Lower Mount Note: This kit (A205-450R) uses a polyurethane lower mount, suited for mild street applications. For corner carving, drag racing, auto-x, or road race use, consider the bearing-end version (A205-450 without the R suffix) for increased reliability and performance. Performance suspension components may feel and sound different from factory rubber-mounted parts.