Bilstein B12 Pro-Kit Suspension Kit for BMW 4 Series Convertible F33 F83
Upgrade the handling, stance and confidence of your BMW 4 Series Convertible with the Bilstein B12 Pro-Kit suspension kit. Part Number: BILSTEIN-46-258083 (Bilstein 46-258083). This is the proven Bilstein B12 package that combines Bilstein B8 high-performance dampers with Eibach Pro-Kit springs for a precise, sporty, road-focused setup that looks right and drives even better.
Ideal for drivers searching for a BMW F33 suspension upgrade or BMW F83 suspension upgrade, a BMW 4 Series lowering kit, lowering springs and shocks, or a direct-fit Bilstein B12 Pro Kit BMW solution. Expect improved turn-in, reduced body roll and a taut, composed ride with excellent high-speed stability. Typical lowering is approximately 10 to 30 mm depending on application, giving your 4 Series a purposeful stance without compromising daily comfort.
Why choose the Bilstein B12 Pro-Kit for your BMW 4 Series?
- Matched system: Bilstein B8 dampers + Eibach Pro-Kit springs engineered to work together for predictable, confidence-inspiring dynamics.
- Lowering of around 10 mm to 30 mm depending on application, with a balanced, OEM-plus ride quality.
- Gas-pressure, high-performance shock absorbers for consistent response under demanding driving.
- Monotube technology and Bilstein expertise for precise control and durability. Upside-down monotube design on select applications.
- Progressive-rate Eibach springs for comfort on small bumps and firmness when you need it.
- German TUV certification and a wide application range backed by Bilstein engineering.
We run these kits and have fitted many for customers. Feedback is consistently positive: sharper steering feel, flatter cornering and a great road stance without harshness. If you are searching for BMW 4 Series F33 lowering springs, BMW 4 Series F83 suspension kit, or the best Bilstein B12 for BMW 4 Series, this is the go-to performance suspension upgrade.
What’s included
- 4 x Bilstein B8 high-performance shock absorbers
- 4 x Eibach Pro-Kit performance springs
- Application-specific tuning for the BMW 4 Series Convertible
Key Features at a glance
- Precise response and excellent driving dynamics
- Balanced aesthetics with practical ride height
- Fine-tuned damper and spring pairing for optimal control
- Bilstein gas-pressure technology
- Monotube technology on select applications
- German TUV certification
Compatibility
BMW 4 Series Convertible F33, F83 (10.13 onwards), including:
- 420i
- 428i
- >430i
- 420d
- 425d
Search terms commonly used for this kit: Bilstein B12 BMW F33, Bilstein 46-258083, BMW 4 Series lowering kit, BMW 420i suspension upgrade, BMW 428i shocks and springs, BMW 430i Bilstein B12, BMW 420d Eibach springs, BMW 425d suspension, BMW F33 lowering springs and shocks, BMW F83 suspension kit.
Compatibility Check
We verify fitment before dispatch. Add your UK registration or the last 7 digits of your VIN at checkout so we can confirm this Bilstein 46-258083 kit is correct for your BMW.
Installation
Professional fitting is recommended. For installation by Nforcd in Warwickshire, request a quote: Sales@nforcd.com.
Technical Details
- Shock absorber type: Gas pressure
- Series: Bilstein B12 Pro-Kit
- Part number: BILSTEIN-46-258083
- EAN: 4025258785000
- UPC: 651860788838
Choose the Bilstein B12 Pro-Kit for your BMW 4 Series Convertible if you want a high-quality, road-tested, OEM-plus BMW suspension upgrade that delivers real-world handling gains, a clean drop and long-term reliability.