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SKU: ASTLS-21-031 | UPC: astASTLS-21-031
AST BMW 2020+ M340i (G20/G21) Lowering Springs 35mm Front 30mm Rear Drop
AST lowering springs ASTLS-21-031 deliver a 35mm front and 30mm rear drop for 2020+ BMW M340i G20 sedan and G21 touring models. They reduce center of gravity to sharpen cornering response and road holding while retaining near-OEM ride compliance. As a direct OEM spring replacement these springs install without modifications for immediate performance gains.
Key Features
- Precise Drop Amounts: 35mm front 30mm rear lowering achieves aggressive stance enhances aerodynamics boosts handling precision without excessive harshness
- Wafios Cold-Coiling: Manufactured on premium Wafios machines using high-tensile chrome-silicon steel for consistent rates maximum durability and sag resistance
- Progressive Rate Design: Variable coil pitch absorbs impacts smoothly during street driving firms up under load for track-capable control
- Lifetime Warranty: Covers breakage and sagging providing long-term confidence in every mile driven
- Vehicle-Specific Development: Engineered exclusively for BMW M340i B58 platform ensures perfect fit OEM compatibility and balanced dynamics
Product Notes
- Verify exact chassis and submodel fitment prior to purchase using the fitment table below
- Combine with performance shocks for full suspension upgrade and optimal results
- Ships complete ready for installation no additional hardware required
Installation Notes
- Professional installation recommended.
- Use quality spring compressor tools standard jack stands and torque wrench
- Direct bolt-on retains all OEM mounts top hats bump stops and hardware
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2020+ | BMW | M340i | Sedan RWD (G20 B58) |
| 2020+ | BMW | M340i xDrive | Sedan (G20 B58) |
| 2021+ | BMW | M340i | Touring RWD (G21 B58) |
| 2021+ | BMW | M340i xDrive | Touring (G21 B58) |
Why Choose AST?
- Motorsport-proven suspension components trusted by racers worldwide
- Premium chrome-silicon steel construction resists fatigue under high stress
- Model-specific tuning matches BMW chassis dynamics perfectly
Frequently Asked Questions
-
Q: Will these springs fit my 2022 BMW M340i xDrive G20?
A: Yes ASTLS-21-031 provides direct OEM replacement fit for all 2020+ G20 M340i and 2021+ G21 M340i models listed in the fitment table -
Q: What material and spring rate details?
A: High-tensile chrome-silicon steel with progressive rates front approximately 450-550 lb/in rear 350-450 lb/in tuned for balance -
Q: What does the warranty cover installation time?
A: Lifetime warranty against breakage sagging or manufacturing defects. Installation takes 2-4 hours per corner with professional tools
Shipping & Handling
- Method: UPS Ground or FedEx Ground
- Availability: In stock - ships same or next business day
- Packaging: Securely boxed 20 x 10 x 10 inches
- Weight: 11 lbs
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