Product Details
These Ground Control coilover conversion kits fit the 2020-2026 BMW M4.
Ground Control Coilover Conversion Kits for the BMW M4 add adjustable ride height and corner balance. The threaded spring perch system lowers the car and reduces body roll, and it works with stock or aftermarket struts.
Every kit is hand-built in the USA and backed by a lifetime guarantee on the complete assembly, not just the springs. Ground Control is the West Coast distributor for Eibach ERS race springs, which are warrantied for life against sag and rate change. The anodized 6061-T6 aluminum adjusters lock securely under load.
Standard Features
- Ride-height adjustable threaded spring perch system
- Eibach ERS race springs with lifetime warranty against sag and rate change
- Any race or street spring rate available on request
- 6061-T6 anodized aluminum adjusters with square-cut threads that lock under load
- Setscrew-secured spring seat holds your ride-height setting in place
- Upper spring perches insulate the spring for quieter operation
- Designed to work with stock or aftermarket dampers
- Adjustment wrench provided where required
- Hand-built in the USA with a lifetime guarantee on the complete kit, not just the springs
Specifications
| Part Number | 2047.12 |
| Part Name | Ground Control Coilover Conversion Kit |
| Vehicle | 2020-2026 BMW M4 |
| Approximate Drop (inches) - Front | 0 to -1.75 |
| Approximate Drop (inches) - Rear | 0 to -1.75 |
| Ride-Height Adjustable | Yes |
| Springs | Eibach ERS (any rate available) |
| Notes | Removal of the stock spring seat and welding required; kit does not include dampers |
Important Fitment Note
This is a spring-and-adjuster conversion kit and does not include dampers. It installs over your stock or aftermarket struts, and removal of the stock spring seat plus welding is required.