UMI Performance A225-350R Viking Front Coilover Kit Double Adjustable Bearing 350lb Spring

The UMI Performance A225-350R is a front coilover kit pairing a USA-made hybrid coil spring with a Viking 19-position double adjustable shock, engineered for classic GM muscle car platforms. The kit includes two front coilover shocks and two front springs in your selected rate, designed to suit drag racing, street cruising, road racing, and autocross use cases. Every shock is individually built, dyno tested, and serialized at Viking's facility in Lakeville, Minnesota — and can be rebuilt at Viking or an authorized Viking rebuild center for long-term serviceability.

Key Features:

• 19-way double adjustable damping: Independent compression and rebound adjusters with 19 positions each (361 total combinations) allow precise custom tuning for street, strip, autocross, and road race applications
• Bearing lower mount: Bearing-end lower shock attachment provides increased reliability and performance compared to polyurethane, ideal for corner carving, drag racing, autocross, and road racing
• Hybrid coil springs — Made in USA: Upper coil section fits the vehicle's factory upper spring perch; the lower section integrates directly with the coilover shock body
• No spring compressor required: The ride height adjuster ring acts as the coil compressor, simplifying installation and height changes
• Brilliant protective finish: Springs feature a durable protective coating engineered to resist corrosion and maintain appearance long-term
• Compatible lower a-arm: Works with UMI's performance lower a-arm or the factory GM lower a-arm
• Spanner wrench and thrust bearing kit (optional): The spanner wrench allows ride height adjustment without removing the shock; the thrust bearing kit placed between the spring and spring seat makes height adjustments significantly easier by allowing the seat to rotate on a bearing. Strongly recommended but not required for installation

Front Spring Rate Options (choose at time of purchase):

• 250 lb/in — 11-inch tall spring for drag race only; serious front-end weight reduction required
• 350 lb/in — Small block cruise or drag race applications; front-end lightening recommended (this listing)
• 450 lb/in — Small block street/cruise or big block drag race
• 550 lb/in — Small block handling and all big block applications except drag race; allows up to 2 inches of lowering
• 650 lb/in — Small block and big block handling, autocross; allows up to 2 inches of lowering

What's Included:

• (2) Viking front double adjustable coilover shocks with bearing lower mounts
• (2) USA-made hybrid front coil springs — 350 lb/in rate

Pair this kit with UMI's geometry-corrected upper a-arm and tall ball joint for maximum performance on the autocross course, drag strip, or weekend cruise. Viking shocks can be revalved or rebuilt to maintain peak performance over the life of the vehicle.