Bilstein B12 Pro-Kit Lowering Springs & Shocks Kit for BMW 4 Series Convertible/Cabriolet F33 F83 (420i 428i 430i 420d 425d) - B8 Dampers + Eibach Pro-Kit - Sport Suspension Drop Kit - 46-258083

BMW 4 Series Convertible F33 F83 Sport Suspension Upgrade - Bilstein 46-258083

Transform the way your BMW 4 Series cabriolet drives and looks with this expertly matched spring and damper package. Part number: BILSTEIN-46-258083 (Bilstein 46-258083). This fast-road setup pairs Bilstein performance shock absorbers with Eibach progressive coils for a lower ride height, tighter body control and a confident, planted feel on British roads.

Expect a purposeful stance and real-world handling gains. Typical ride-height reduction is around 10 to 30 mm depending on specification, giving your drop-top a clean, even drop without ruining comfort. Ideal if you want crisper turn-in, less roll through bends and high-speed stability that inspires trust.

Why enthusiasts choose this package

• Matched spring and shock bundle engineered to work together for predictable dynamics
• Improved cornering grip, reduced pitch and dive, enhanced steering precision
• Gas-pressure, monotube technology for consistent damping on B-roads and motorways
• Eibach progressive-rate coils balance ride comfort with firm support when pushed
• Road-proven reliability with German TUV approval
• Direct replacement for factory components for a fuss-free upgrade

We run this setup ourselves and have installed it for many customers. Feedback is consistently positive: flatter cornering, better composure over rough surfaces and a stance that looks just right. If you are after an OEM-plus feel with genuine performance benefits, this is the go-to choice.

What you get in the box

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

Fitment

BMW 4 Series Convertible F33, F83 from 10.2013 onwards, including:

• 420i
• 428i
• 430i
• 420d
• 425d

Key advantages at a glance

• Sportier road holding with day-to-day comfort retained
• Ride height reduction of approximately 10 to 30 mm depending on model
• Fast-road focused damping for confident, composed control
• High-quality components designed for long service life

Compatibility check

We verify fitment before dispatch. Add your UK registration or the last 7 of your VIN at checkout so we can confirm Bilstein 46-258083 is correct for your car.

Professional installation

We recommend expert fitting and a four-wheel alignment for best results. Book installation with MJ Modifications in Warwickshire. Request a quote: info@mjmodifications.co.uk.

Technical details

• Series: Bilstein B12 Pro-Kit
• Shock absorber type: Gas pressure, monotube technology
• Part number: BILSTEIN-46-258083
• EAN: 4025258785000
• UPC: 651860788838

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