Bilstein B12 Pro-Kit 46-181251 Fits BMW Z4 E86 3.0si Coupe (2006-2009) – B8 Sport Shocks/Struts + Eibach Pro-Kit Lowering Springs – Shock & Spring Kit, Suspension Upgrade/Handling Pack (10–30mm Drop)

BMW Z4 E86 3.0si Coupe Shock and Spring Package by Bilstein and Eibach

Give your E86 the chassis response it deserves. This fixed-height sport suspension bundle combines Bilstein’s renowned monotube gas-pressure shock absorbers with Eibach’s progressive-rate spring set to deliver crisp steering, reduced body roll and a purposeful ride height drop without ruining day-to-day comfort. It is a brilliant fast-road setup for drivers who want confidence, control and an OEM-plus look.

Part number: BILSTEIN-46-181251 | EAN: 4025258674649 | UPC: 651860673042

Why this upgrade works on the Z4 E86

• Matched spring and damper rates for balanced handling and excellent composure on British B-roads
• Gas-pressure monotube technology for consistent performance and fade resistance on spirited drives
• Progressive coils for improved control in the corners with compliant ride quality on rough tarmac
• Ride height reduction typically around 10 mm to 30 mm depending on application, creating an aggressive yet usable stance
• German TÜV approved quality and direct bolt-on installation for the Z4 coupe platform

What is included

• 4 x Bilstein performance shock absorbers (shortened sport dampers)
• 4 x Eibach Pro-Kit progressive springs
• A matched shock and spring kit designed to work together out of the box

Vehicle compatibility

BMW Z4 Coupe E86 3.0si

• Chassis: E86
• Model years: 2006 to 2009
• Engine: 3.0si

Tailored for the E86 coupe for a straightforward, bolt-on replacement of tired factory dampers and springs.

Real-world benefits

• Sharper turn-in and flatter cornering for more confidence on road and motorway
• Improved grip and stability with predictable, linear responses
• Sporty stance without the harshness associated with extreme drop kits
• Durable, German-engineered components from two of the most trusted names in suspension

Our take

We have fitted this setup to customer Z4s and the feedback is consistently excellent. Owners report a night-and-day improvement in handling precision, reduced roll and a refined ride that still copes with daily duties. It is one of the best value performance suspension upgrades for the E86 3.0si.

Fitment check

We will verify compatibility before dispatch. Add your UK registration or the last 7 digits of your VIN at checkout so we can confirm the correct application for your car.

Professional installation

Want it fitted properly first time? Book installation with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a fitting quote and availability.

Key points at a glance

• Fixed-height sport suspension for the BMW Z4 E86 3.0si
• Matched Bilstein shocks and Eibach springs for fast-road use
• Monotube gas-pressure damping for consistency and control
• Progressive-rate coils for comfort and grip
• Approximate lowering range: 10 mm to 30 mm depending on application
• TÜV certified and direct-fit for the E86 coupe

Search-friendly terms

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