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SKU: ASTLS-22-304
AST 07/2021+ BMW 4 Series Lowering Springs - 35mm Front / 35mm Rear
AST lowering springs deliver a 35mm drop for 2021 and newer BMW 4 Series models including G22 Coupe G23 Convertible and G26 Gran Coupe. These direct OEM replacements lower the center of gravity to sharpen handling while keeping the familiar ride comfort of stock springs. Vehicle-specific design ensures perfect fit and progressive spring rates for balanced performance on street or track.
Key Features
- 35mm Front and Rear Drop: Reduces center of gravity for improved cornering stability and aggressive stance without sacrificing daily drivability
- Progressive Spring Design: Provides linear response that absorbs bumps smoothly yet firms up under load for confident control
- Premium High-Tensile Steel Construction: Coiled on advanced Wafios machines for consistent performance and resistance to sagging over time
- Vehicle-Specific Engineering: Developed exclusively for BMW 4 Series models ensuring bolt-on installation with OEM shocks and components
- Lifetime Warranty: Guaranteed against breakage for complete confidence in long-term durability
Product Notes
- Direct replacement for OEM springs no modifications required
- Pair with OEM or aftermarket shocks for optimal results
- Special order item expect 3-5 business days for processing
Installation Notes
- Professional installation recommended.
- Wheel alignment required after installation to ensure proper tire wear and handling.
- Fully compatible with OEM mounting hardware and dampers.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2021-2024 | BMW | 4 Series | M440i Coupe (G22) |
| 2021-2024 | BMW | 4 Series | M440i xDrive Coupe (G22) |
| 2022-2024 | BMW | 4 Series | 430i Coupe (G22) |
| 2022-2024 | BMW | 4 Series | 430i xDrive Coupe (G22) |
| 2021-2024 | BMW | 4 Series | M440i Convertible (G23) |
| 2021-2024 | BMW | 4 Series | M440i xDrive Convertible (G23) |
| 2022-2024 | BMW | 4 Series | 430i Convertible (G23) |
| 2022-2024 | BMW | 4 Series | 430i xDrive Convertible (G23) |
| 2022-2024 | BMW | 4 Series Gran Coupe | M440i Gran Coupe (G26) |
| 2022-2024 | BMW | 4 Series Gran Coupe | M440i xDrive Gran Coupe (G26) |
| 2022-2024 | BMW | 4 Series Gran Coupe | 430i Gran Coupe (G26) |
| 2022-2024 | BMW | 4 Series Gran Coupe | 430i xDrive Gran Coupe (G26) |
Why Choose AST?
- Proven track record in motorsport suspension components
- High-strength materials built for demanding conditions
- Precision engineering tailored to BMW chassis dynamics
Frequently Asked Questions
-
Q: Will these fit my 2021 BMW M440i Coupe built after July 2021?
A: Yes these springs are engineered specifically for 07/2021+ BMW 4 Series production across G22 G23 and G26 body styles including all 430i and M440i variants. -
Q: What material are the springs made from?
A: High-tensile spring steel coiled on Wafios machines for superior fatigue resistance and consistent rates. -
Q: What does the lifetime warranty cover?
A: Full protection against manufacturing defects including breakage or sagging when installed and used properly.
Shipping & Handling
- Method: UPS Ground
- Availability: In stock - ships same or next business day
- Packaging: Securely boxed dimensions 20 x 8 x 8 inches
- Weight: 11 lbs
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