UMI Performance A204-350T Front Coilover Double Adjustable Lowering Kit Spring Rate - 350lb

The UMI Performance A204-350T is a front coilover adjustable spring lowering kit engineered for GM muscle cars and performance vehicles. This kit pairs a hybrid coil spring manufactured in the USA with a Viking double adjustable coilover shock, giving drivers precise control over ride height and damping characteristics for street, strip, autocross, or road racing applications.

At its core, the A204-350T features a 350 lb/in spring rate — ideal for small block cruise or drag race builds with lightening. The included Viking coilover shock offers 19-way independent compression and rebound adjustment, yielding 361 possible damping combinations to dial in exactly the right feel for any driving environment. Every shock is individually built, dyno tested, and serialized at Viking's facility in Lakeville, Minnesota, ensuring consistent, verifiable quality.

Key Features:

• 350 lb/in hybrid coil spring — Made in USA; suited for small block cruise or drag race with lightening
• Double adjustable Viking coilover shocks — 19-way independent compression and rebound (361 combinations)
• Supports up to 3 inches of ride height lowering from factory position
• Bearing-mounted lower shock attachment for increased reliability and performance
• No coil spring compressor required — the adjuster ring acts as the compressor
• Brilliant protective finish on springs for long-term durability
• Each shock is dyno tested and serialized in Lakeville, Minnesota
• Shocks are fully rebuildable at Viking or an authorized Viking rebuild center
• Compatible with UMI geometry-corrected upper a-arms and factory lower a-arms

Available Spring Rate Options:

• 250 lb/in — Drag race only; serious weight reduction required
• 350 lb/in — Small block cruise or drag race with lightening (this kit)
• 450 lb/in — Small block cruise or big block drag race
• 550 lb/in — Small block handling; all big blocks except drag

Mounting Options:

• Polyurethane lower mount — Recommended for mild street use; provides ride comfort and reduced harshness
• Bearing lower mount — Recommended for performance applications including drag, autocross, and road racing

Optional Accessories (sold separately):

• Spanner Wrench — Required tool for adjusting ride height while the shock remains mounted
• Thrust Bearing Kit — Placed between the spring and spring seat for easier, smoother ride height adjustments; highly recommended though not required for installation

The A204-350T coilover kit integrates seamlessly with UMI's lower control arms or your factory lower a-arm. For best handling performance, pair with UMI's geometry-corrected upper a-arm with tall ball joint. Whether you're heading to the track, the autocross course, or the weekend cruise, this kit delivers the adjustability and build quality to perform.