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SKU: ACU-B2114SD | UPC: astACU-B2114SD
AST 2021+ BMW M3 G80 / M4 G82 XDrive 5100 Street Series Coilovers
AST Suspension ACU-B2114SD 5100 Street Series coilovers provide 1-way rebound and ride-height adjustment for 2021-2023 BMW M3 G80 Competition xDrive and M4 G82 Competition xDrive models. Front inverted monotube dampers use coilover design while rear maintains divorced OEM-style setup with OEM top mounts for everyday road balance and grip control. Rebuildable construction ensures long-term reliability across driving conditions.
Key Features
- Monotube Design: Large piston controls rebound damping without aeration or foaming for responsive valving and consistent performance.
- Rebound Adjustment: 12 precise click positions adjust damper return to extension for customized road feel and handling balance.
- Ride Height Adjustment: Threaded bodies allow easy lowering or height changes to suit track or street preferences.
- Front Coilover Rear Divorced: Inverted monotube fronts pair with OEM-like rear setup using fixed spring rates for comfort and stability.
- Rebuildable Dampers: Service at certified AST centers restores full performance after heavy use.
Product Notes
- Designed to retain OEM top mounts for straightforward integration.
- Fixed rear spring rates of 14 kgf/mm and front 12 kgf/mm from extensive testing provide balanced setup.
- High-pressure monotube dampers perform reliably in varied conditions.
Installation Notes
- Professional installation recommended.
- Compatible with OEM top mounts front and rear.
- Requires standard coilover tools. verify alignment after install.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2021-2023 | BMW | M3 | Competition xDrive |
| 2022-2023 | BMW | M3 | Competition |
| 2021-2023 | BMW | M4 | Competition xDrive |
| 2021-2023 | BMW | M4 | Competition |
Why Choose AST Suspension?
- Proven in motorsport with decades of suspension expertise.
- Monotube technology delivers fade-free damping under load.
- Vehicle-specific engineering ensures exact fit and tuned response.
Frequently Asked Questions
-
Q: Does this fit BMW M3 G80 and M4 G82 xDrive models?
A: Yes, ACU-B2114SD fits 2021-2023 BMW M3 Competition xDrive sedans and M4 Competition xDrive coupes with OEM top mount compatibility. -
Q: What materials are used in construction?
A: Inverted monotube steel dampers with aluminum components for durability and heat dissipation. -
Q: What warranty or service options exist?
A: Rebuildable at AST service centers worldwide for sustained performance. contact dealer for details.
Shipping & Handling
- Method: UPS Ground or FedEx
- Availability: In stock - ships same or next business day
- Packaging: Secure double-boxed dimensions 42 x 16 x 14 inches
- Weight: 52 lbs
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