Bilstein B12 Pro Kit Suspension for BMW 4 Series F33 425d Convertible/Cabriolet (2014-2018) | Lowering Springs, Shocks/Dampers & Struts Sport Suspension Upgrade | Shock Absorber & Spring Kit | Part No. 46-258205

Bilstein B12 Pro Kit | Shock Absorber and Spring Package for BMW 4 Series F33 425d Cabriolet 2014 to 2018 | Part 46-258205

Transform the way your BMW F33 425d drives and looks with this complete Bilstein B12 Pro Kit. Designed for the 4 Series Convertible, this matched shock and spring package delivers a confident, planted feel, sharper steering response and a purposeful ride height drop while keeping everyday comfort intact. If you want a fast-road handling upgrade without the faff of height adjustment, this fixed-rate setup is the smart choice.

Part number: 46-258205. Suitable for BMW 4 Series F33 425d Convertible model years 2014 to 2018.

What you get

• Complete sport suspension package with uprated dampers and performance springs
• Vehicle-specific valving and spring rates for the F33 425d cabriolet
• Fixed ride height reduction for a cleaner stance and lower centre of gravity
• Direct replacement components that integrate with OE fitment
• Balanced road manners for British B-roads and motorway cruising

Why enthusiasts choose this kit

• Noticeably tighter body control and reduced roll in corners
• Improved front-end bite, quicker direction changes and increased stability at speed
• Refined damping that takes the edge off rough surfaces without feeling floaty
• A proper fast-road setup that looks right and feels right

Real-world results

We have installed this Bilstein package on customer F33 builds and run it on our own projects. Feedback is consistently positive: more grip, better composure over bumps and a stance that perfectly suits the 4 Series Cabriolet. Owners describe the car as more predictable, more confidence-inspiring and far more enjoyable on UK roads.

Compatibility

• BMW 4 Series F33 Convertible
• 425d
• Model years 2014 to 2018

Fitting and alignment

Professional installation and a four-wheel alignment are recommended to maximise performance and tyre life. Book fitting with MJ Modifications in Warwickshire. For a quote, email info@mjmodifications.co.uk.

Warranty

2 year Bilstein warranty.

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Product reference

Bilstein B12 Pro Kit | Part number: 46-258205