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Condition notes recorded before palletizing.
30-Day Startup Warranty
Covers block, heads and internal moving components.
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Suspension
UMI Performance Stage 4 Handling Kits GBF005-2-B
€2,136.31
+ freight from €149.00, insured road freight, priced by delivery region
(rates)
From €2,285.31 delivered
- ISPM 15 heat-treated Euro palletized & weatherproof shrink-wrapped
- Insured European road freight delivery with hydraulic tail-lift service
- Dispatches in 1–2 business days from our UK & European Logistics Centre
- Transit typically 1–3 business days (UK) / 3–6 business days (Continental Europe)
Need a matched transmission, controls or wiring package? Speak with a parts specialist.
Details & Inspection Notes
UMI's Stage 4 kit GBF005-2-B centers on 361-position adjustable monotube shocks at both ends, the finest damping adjustment in this handling-kit lineup, paired with a 550 lbs./in. front spring rate. A solid 1.25" front sway bar and solid 1.00" rear sway bar work alongside tubular steel control arms finished in black.
What's in the kit
The rear end gets adjustable upper trailing arms along with a fixed lower trailing arm and trailing arm mount braces, all running on Delrin bushings. UMI includes the mounting hardware needed for the install, and no welding or chassis cutting is called for to get it bolted in.
What to check before buying
With 361 damping positions on tap, plan on spending some time dialing in compression and rebound rather than expecting a single ideal setting out of the box. This kit is built around classic muscle cars and performance builds generally, so it's a good fit if you're chasing serious adjustability rather than a simpler fixed-rate setup.
Common questions
What does 361-position adjustable mean? The front and rear monotube shocks can be set to 361 different damping positions instead of one fixed rate.
What's the front spring rate? 550 lbs./in., as listed for this kit.
Specifications
| Feature | Details |
|---|---|
| MFG. Part # | GBF005-2-B |
| Brand | UMI Performance |
| Vehicle Compatibility | Classic Muscle Cars & Performance Builds |
| Front Coil Springs Included | Yes |
| Rear Coil Springs Included | Yes |
| Front Shock Type | 361-Position Adjustable Monotube |
| Rear Shock Type | 361-Position Adjustable Monotube |
| Front Sway Bar | Yes (Solid, 1.25″ Diameter) |
| Rear Sway Bar | Yes (Solid, 1.00″ Diameter) |
| Upper Trailing Arms | Yes (Adjustable) |
| Lower Trailing Arms | Yes |
| Trailing Arm Mount Braces | Yes |
| Panhard Bar | No |
| Torque Arm | No |
| Upper Control Arms | Yes (Tubular Steel) |
| Lower Control Arms | Yes (Tubular Steel) |
| Control Arm Color | Black |
| Bushing Material | Delrin® |
| Bushing Color | Black |
| Spring Rate (Front) | 550 lbs./in. |
| Mounting Hardware Included | Yes |
| Quantity | Sold as a Kit |
Suspension Setup & Installation Checklist
- Inspect top mounts, damper seals, bushings, and ball joints prior to fitment.
- Set initial spring preload, collar heights, and damper rebound clicks symmetrically left to right.
- Torque all suspension control arm pivot bolts while the vehicle is at resting ride height (loaded suspension).
- Perform a complete 4-wheel laser alignment once ride height has settled to ensure optimal handling and tire wear.
Full terms: 30-day warranty · returns
