Bilstein B12 Pro-Kit Spring & Shock Suspension Kit for BMW 4 Series xDrive F32/F82 AWD Coupe (430i 435i 440i 430d 435d) | B8 Shock Absorbers + Eibach Pro-Kit Lowering Springs | Sport Suspension/Handling Upgrade | Part 46-280558

Bilstein B12 Pro-Kit for BMW 4 Series xDrive F32 F82 Coupe - Part 46-280558

Give your BMW 4 Series AWD coupe the stance, control and confidence it deserves. The Bilstein B12 Pro-Kit pairs Bilstein B8 monotube gas dampers with Eibach Pro-Kit progressive coils to deliver sharper turn-in, flatter cornering and a purposeful ride height drop. Perfect for fast-road use on UK B-roads and motorways, this sport suspension package is a direct-fit upgrade for xDrive models such as 430i, 435i, 440i, 430d and 435d.

We have installed and run this kit ourselves at MJ Modifications and feedback from our customers has been consistently positive. Expect precise steering feel, reduced body movement and a composed, comfortable drive day to day, with real gains in road holding when you push on.

Why this kit

• Approx. 10 to 30 mm drop depending on model and axle load for a cleaner stance and reduced arch gap
• Uprated B8 performance dampers control progressive Eibach coils for excellent grip and stability
• Monotube, gas-pressure technology for consistent damping and fade resistance
• Engineered to OE-level standards with German quality and TÜV approval
• Fixed-rate, expertly matched setup for drivers who want plug-in-and-drive results without the faff of adjusters

What you get

• 4 x Bilstein B8 high-performance shock absorbers
• 4 x Eibach Pro-Kit progressive springs
• Vehicle-specific tuning for BMW 4 Series xDrive applications

Fitment

BMW 4 Series Coupe

• F32, F82 from 07.2013 onward
• 430i xDrive
• 435i xDrive
• 440i xDrive
• 430d xDrive
• 435d xDrive

Note: Actual ride height change varies by engine, equipment and axle weight. Designed specifically for the models listed above.

Technical highlights

• Damping type: Gas-pressure, monotube
• Progressive-rate Pro-Kit springs for comfort over small bumps with strong support in hard cornering
• Matched spring and damper rates for balanced chassis response
• TÜV tested

Part numbers and identifiers

• Primary part number: 46-280558
• Alt reference: BILSTEIN-46-280558
• EAN: 4025258837976
• UPC: 651860845494

Compatibility check

We verify fitment before dispatch. Add your UK registration or the last 7 of your VIN at checkout and our team will confirm suitability for your specific BMW 4 Series.

Installation

Professional fitting and a four-wheel alignment are strongly recommended to maximise performance and tyre wear. MJ Modifications offers expert installation in Warwickshire. Request a quote: info@mjmodifications.co.uk.

Customer results

Owners report crisper responses, improved braking stability and a noticeable reduction in body roll, with everyday comfort retained for commuting and long journeys. It is the sweet spot for a road-focused BMW upgrade.

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