SPL Parts adjustable rear upper arms (RUA) for the 2021+ BMW G80 M3, G82/G83 M4 and G87 M2, a complete rear upper camber/lateral and upper traction link kit that replaces the factory wishbone and guide links. The factory setup runs an aggressive camber curve through bump travel that causes premature inside-edge tire wear and reduced traction; these arms provide a wide adjustment range for precise rear camber, eliminating bushing deflection with Teflon-lined rod ends. Designed and built in the USA.
Specifications
| Type | Rear upper camber/lateral + traction links |
| Position | Rear |
| Material | 6061-T6 aluminum (billet + gun-drilled) |
| Adjustment | Camber (double adjuster) |
| Quantity | Set |
| Part Number | SPL RUA G8X |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2021-2023,2025-2026 | BMW | M3 | Base |
| 2021-2023,2025-2026 | BMW | M3 | Competition |
| 2022-2023,2025-2026 | BMW | M3 | Competition xDrive |
| 2021-2026 | BMW | M4 | Base |
| 2025 | BMW | M4 | CS |
| 2023 | BMW | M4 | CSL |
| 2021-2026 | BMW | M4 | Competition |
| 2022-2026 | BMW | M4 | Competition xDrive |
Shipping
- In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
- Standard, expedited, and overnight options at checkout.
- Oversized items ship by freight and take longer.
- Backordered items ship as soon as stock lands — contact us for lead times.
- International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.
Returns
- 30-day returns on new, uninstalled items in original packaging with all hardware.
- Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
- Installed or used parts can’t be returned — confirm fitment before you install.
- Special orders and custom items are final sale.
- Email us for return authorization before shipping anything back.
Full details: Shipping Policy · Refund Policy
