Dinan's Performance Spring Set uses carefully calibrated rates to reduce body roll and lower the car for improved suspension geometry and a more aggressive stance. Each spring is CNC wound from high tensile chrome silicon wire, shot-peened for stress relief, and preset to prevent sag. Front stiffness increases by up to 95% and rear by up to 92% on the 330i depending on stock configuration, while the M340i and M440i xDrive receive targeted rear rate increases of 10 to 23%. The set drops ride height by roughly 5/8 to 1-1/8 inch depending on model and stays compatible with both conventional and factory electronic shocks.
| Type | Performance lowering spring set |
| Material | CNC-wound chrome silicon steel wire, shot-peened |
| Drop Height | 5/8" to 1-1/8" front, 5/8" to 1" rear (varies by model) |
| Shock Compatibility | Conventional and factory electronic shocks |
| Part Number | D100-0934 |
Documents: Installation Instructions (PDF)
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2019-2026 | BMW | 330i | Base |
| 2019-2026 | BMW | 330i xDrive | Base |
| 2020-2026 | BMW | M340i | Base |
| 2020-2026 | BMW | M340i xDrive | Base |
| 2021-2026 | BMW | M440i xDrive | Base |
Shipping: In-stock orders placed before 3 PM EST ship the same day, and everything else ships within 24 hours. Standard, expedited, and overnight options are available at checkout. Backordered items ship as soon as we get them back in stock. Contact us for lead times. See the full Shipping Policy.
Returns: 30-day returns on new, unused items in original packaging. See the full Refund Policy.
