SKU: ASTLS-22-303
AST 07/2021+ BMW 4 Series Lowering Springs – 25mm/25mm
AST Lowering Springs deliver a 25mm drop front and rear for 2021+ BMW 4 Series Coupe (G24) Convertible (G23) and Gran Coupe (G26) models. These direct OEM replacements lower the center of gravity to sharpen handling and cornering while maintaining everyday ride comfort. Progressive rates and vehicle-specific tuning ensure seamless integration with stock or upgraded suspension components.
Key Features
- 25mm Front/Rear Drop: Lowers ride height precisely for improved stability aerodynamics and stance without sacrificing suspension travel
- Progressive Spring Design: Variable rates provide compliant ride over bumps and firm control during aggressive driving
- Premium Materials Wafios Coiling: High-tensile steel coiled on advanced Wafios machines for consistent performance and corrosion resistance
- Vehicle-Specific Engineering: Custom-developed for exact fit on 2021+ BMW 4 Series preserving OEM geometry and alignment
- Lifetime Warranty: Guaranteed against breakage for complete confidence in long-term durability
Product Notes
- Complete set includes front and rear springs for straightforward OEM swap
- Retains full compatibility with factory dampers electronic systems and ride height sensors
- Packaged for protection arrives ready to install
Installation Notes
- Professional installation recommended.
- Use spring compressor tool torque to BMW specs for rear perch nuts
- Direct bolt-on no modifications needed works with OEM or coilover shocks
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2021-2024 | BMW | 4 Series Coupe | 430i (G24 B44) |
| 2021-2024 | BMW | 4 Series Coupe | 430i xDrive (G24 B44) |
| 2021-2024 | BMW | 4 Series Coupe | M440i (G24 B46) |
| 2021-2024 | BMW | 4 Series Coupe | M440i xDrive (G24 B46) |
| 2022-2024 | BMW | 4 Series Convertible | 430i (G23 B46) |
| 2022-2024 | BMW | 4 Series Convertible | 430i xDrive (G23 B46) |
| 2022-2024 | BMW | 4 Series Convertible | M440i xDrive (G23 B46) |
| 2022-2024 | BMW | 4 Series Gran Coupe | 430i (G26 B44) |
| 2022-2024 | BMW | 4 Series Gran Coupe | 430i xDrive (G26 B44) |
| 2022-2024 | BMW | 4 Series Gran Coupe | M440i xDrive (G26 B46) |
Why Choose AST?
- Proven across 3000+ vehicle models from 1966 to 2023 for broad reliable application coverage
- Precision manufacturing matches OEM quality with performance gains
- Application-specific development ensures perfect balance of drop comfort and dynamics
Frequently Asked Questions
- Q: Will these fit my 2022 BMW 430i xDrive Coupe G24?
A: Yes fits all 07/2021+ BMW 4 Series Coupe Convertible Gran Coupe including 430i xDrive verify submodel via VIN for exact match - Q: What spring rate or material is used?
A: Progressive rates in high-strength chrome-silicon steel coiled on Wafios CNC machines for fatigue resistance and longevity - Q: What does the lifetime warranty cover?
A: Protects against sagging or breakage under normal use excludes abuse or improper installation contact manufacturer for claims
Shipping & Handling
- Method: UPS Ground or FedEx Ground
- Availability: In stock – ships same or next business day
- Packaging: Sturdy cardboard box 20 x 10 x 10 inches
- Weight: 22 lbs
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