SKU: ASTLS-22-310
AST 11/2020+ BMW 4 Lowering Springs – 25mm/20mm
AST Lowering Springs lower the center of gravity on 2021+ BMW 4 Series Coupe Convertible and Gran Coupe models by 25mm front and 20mm rear. These direct OEM replacements maintain familiar ride comfort while sharpening handling and road feel. Vehicle-specific engineering ensures perfect fit and progressive performance for daily driving and spirited use.
Key Features
- Precise Drop Specs: 25mm front 20mm rear reduction improves stance and cornering stability without sacrificing daily usability
- Progressive Spring Design: Variable rates deliver smooth compliance over bumps paired with firm control during aggressive maneuvers
- Vehicle-Specific Development: Tailored rates and dimensions for each BMW 4 Series variant from 11/2020 production onward
- Premium Construction: High-tensile spring steel coiled on Wafios machines for durability and consistent performance
- Lifetime Warranty: Guaranteed against breakage covering peace of mind across 3000+ vehicle applications since 1966
Product Notes
- Complete front and rear spring set for straightforward replacement
- Perform wheel alignment after installation for optimal tire wear and handling
- Pairs with factory or aftermarket shocks box dimensions 18in x 8in x 8in
Installation Notes
- Professional installation recommended.
- Requires spring compressor tool for safe OEM spring removal.
- Fully compatible with BMW factory struts mounts and hardware.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2021+ | BMW | 4 Series | 430i Coupe (G24) |
| 2021+ | BMW | 4 Series | 430i xDrive Coupe (G24) |
| 2021+ | BMW | 4 Series | M440i Coupe (G24) |
| 2021+ | BMW | 4 Series | M440i xDrive Coupe (G24) |
| 2022+ | BMW | 4 Series | 430i Convertible (G23) |
| 2022+ | BMW | 4 Series | 430i xDrive Convertible (G23) |
| 2022+ | BMW | 4 Series | M440i Convertible (G23) |
| 2022+ | BMW | 4 Series | 430i Gran Coupe (G26) |
| 2022+ | BMW | 4 Series | 430i xDrive Gran Coupe (G26) |
| 2022+ | BMW | 4 Series | M440i Gran Coupe (G26) |
| 2022+ | BMW | 4 Series | M440i xDrive Gran Coupe (G26) |
Why Choose AST?
- Proven suspension expertise across decades of BMW applications
- High-strength materials resist sagging for long-term ride height retention
- Exact engineering matches OEM tolerances for bolt-on simplicity
Frequently Asked Questions
- Q: Will these fit my 2022 BMW M440i xDrive Gran Coupe?
A: Yes fits all 11/2020+ BMW 4 Series Coupe Convertible Gran Coupe submodels including M440i xDrive with 25mm front 20mm rear drop - Q: What material are the springs made from?
A: High-tensile chrome silicon steel coiled on precision Wafios machines for fatigue resistance and longevity - Q: What does the warranty cover?
A: Lifetime protection against manufacturing defects and breakage when installed and used properly
Shipping & Handling
- Method: UPS Ground or FedEx Ground
- Availability: In stock – ships same or next business day
- Packaging: Securely boxed set 18 x 8 x 8 inches
- Weight: 15 lbs
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