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Dial In Your G8X Chassis Balance From Neutral Street To Aggressive Track
Body roll is the enemy of confident turn-in, and the factory sway bars on the G8X M2, M3, and M4 were tuned for a broad range of drivers rather than your specific setup. The Eibach E40-20-057-01-11 Anti-Roll-Kit swaps in a 3-way adjustable front and rear sway bar pair so you can tune front-to-rear balance anywhere from a neutral street feel to an aggressive track setup.
Key Features
- Front sway bar measures 28.58mm, rear sway bar measures 25.40mm, both tubular
- 3-way adjustable on both front and rear bars for precise front-to-rear balance tuning
- Built from high-tensile spring steel alloy, cold-formed, heat-treated, and shot-peened for fatigue resistance
- Precision-forged ends with OEM-style pressed bushing locators for consistent load distribution
- Developed through direct platform benchmarking and validated with a competitive team running the G8X chassis
- Complete front and rear kit, MPN E40-20-057-01-11
Fitment Table
| Year Range | Make | Model |
|---|---|---|
| 2023-2026 | BMW | M2 |
| 2020-2026 | BMW | M3 |
| 2021-2026 | BMW | M4 |
Specifications
| Detail | Value |
|---|---|
| Brand | Eibach |
| MPN | E40-20-057-01-11 |
| UPC | N/A |
| Front Bar Diameter | 28.58mm, tubular, 3-way adjustable |
| Rear Bar Diameter | 25.40mm, tubular, 3-way adjustable |
| Material | High-tensile spring steel alloy |
| Included | Front and rear sway bar kits |
What's Included
- One Eibach front sway bar, 28.58mm, 3-way adjustable
- One Eibach rear sway bar, 25.40mm, 3-way adjustable
- Mounting bushings and hardware
About Eibach
Eibach has engineered performance springs and suspension components since 1988, drawing on decades of motorsport experience to build products that improve handling, stance, and off-road capability without sacrificing ride quality.
FAQ
What is the E40-20-057-01-11?The E40-20-057-01-11 is an Eibach Anti-Roll-Kit for the BMW M2, M3, and M4 G8X chassis, including a 3-way adjustable front and rear sway bar.
What sizes are the front and rear sway bars?The front sway bar is 28.58mm and the rear sway bar is 25.40mm, both tubular and 3-way adjustable.
Can I adjust this kit for track use?Yes, both bars offer 3-way adjustability, allowing you to tune from a neutral street setup to an aggressive track configuration.
Does this kit fit the M2, M3, and M4 equally?Yes, the E40-20-057-01-11 is engineered for the shared G8X platform across the M2, M3, and M4.
What material are the sway bars made from?The bars are made from a high-tensile spring steel alloy, cold-formed, heat-treated, and shot-peened for improved fatigue resistance.
Does this kit include mounting bushings?Yes, the kit includes precision-forged ends with OEM-style pressed bushing locators and mounting hardware.
Is this kit intended for daily driving or racing?Both. The adjustability lets you run a neutral street setup or a stiffer track configuration with the same kit.
Was this kit tested on track?Yes, Eibach validated this kit both internally and with a competitive team racing the G8X chassis.
Install Instructions
- Raise and support the vehicle safely on a lift or jack stands.
- Remove the factory front and rear sway bars along with their end links and bushings.
- Install the Eibach front and rear sway bars using the supplied bushings and hardware.
- Reconnect the sway bar end links to factory torque specification.
- Set the adjustable settings to your preferred street or track configuration.
- Lower the vehicle and verify no interference through full suspension travel and steering lock.
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