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Suspension and Components› Suspension Kits
UMI PERFORMANCE
UMI Performance 64-66 GM A-Body Handling Kit 2in Lowering Stage 1 - Black
SKU: U01C ABF401-2-B
Moderate — 2–4 hours
Overview
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Part #: ABF401-2-B
The Stage 1 is perfect for the A-Body owner who wants a simple and effective suspension upgrade with real handling improvement. This kit includes our trusted 1.250" front sway bar and 1" rear sway bar combined with performance lowering springs and UMI monotube shocks. The sway bars reduce body roll and provide a nice balance when handling at the limit. UMI's 530 lb/in front springs and 130 lb/in linear springs are precision wound from premium CrSi wire and feature medium stiffness to control body movement and reduce floating while still providing a comfortable ride. The UMI monotube shocks feature a large diameter piston and nitrogen charge to dampen bumps and provide a crisp feel without being harsh. The shock is configured with heavy-duty mounts to ensure durability and fits in the stock location. Choose UMI's Stage 1 as a 1st step to transforming your A-Body into a capable daily driver or corner carver. Every component in this kit, as with all UMI products, is Made In USA.
Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Fitment
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Specifications
| Brand | UMI PERFORMANCE |
| Part Number | U01C ABF401-2-B |
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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.
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