UMI Performance A204-350R Viking Front Coilover Kit Double Adjustable Spring Polyurethane - 350lb

The UMI Performance A204-350R is a front coilover kit built in partnership with Viking Performance, pairing a high-quality USA-made hybrid coil spring with a 19-position double-adjustable shock absorber. Designed for versatile performance use, this kit supports ride height adjustments ranging from 1.5" to a full 3" drop without requiring a coil spring compressor — the threaded adjuster serves as the compressor for hassle-free installation.

Each shock is individually built, dyno tested, and serialized at Viking Performance's facility in Lakeville, Minnesota. The independent compression and rebound adjusters provide 19 positions each, yielding up to 361 possible damping combinations to dial in the perfect setup for street cruising, drag racing, auto-cross, or road racing.

Kit Contents:

• (2) Front double-adjustable coilover shocks
• (2) Front hybrid coil springs — 350 lb/in spring rate (see options below)
• Polyurethane lower shock mount bushings

Front Spring Rate Guide:

• 250 lb/in — Drag race only; 11" tall springs; serious vehicle lightening required
• 350 lb/in — Small block street cruising or drag racing; some lightening required
• 450 lb/in — Small block street/cruising or big block drag racing
• 550 lb/in — Small block performance handling; all big block applications except drag racing

Shock Mount Options:

This kit includes polyurethane lower shock mounts, well-suited for mild street applications where ride comfort and reduced harshness are priorities. For more aggressive use — including corner carving, drag racing, auto-cross, and road racing — UMI also offers a bearing-end mount version for improved reliability and crisper response.

Optional Accessories (Sold Separately):

• Spanner Wrench — Required for making ride height adjustments 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 ride height adjustment significantly easier; highly recommended but not required for installation

The kit is fully compatible with UMI's lower control arms as well as factory GM lower A-arms. For maximum performance, pair with UMI's geometry-corrected upper A-arm with tall ball joint. Shocks are rebuildable at Viking Performance or any authorized Viking rebuild center.