Bilstein B8 Performance Plus Rear Shock Absorber for BMW E21 3 Series (315 316 318 320 323i) & ALPINA B6 Lowered/Sport Suspension, Monotube Gas Pressure 24-184618

Bilstein B8 Rear Damper Upgrade for BMW E21 and ALPINA E21 - Part No. 24-184618

Give your classic 3 Series the control it deserves. This Bilstein B8 rear damper, part number 24-184618, is a short-stroke, gas charged monotube unit engineered to work perfectly with lowering springs and factory sport chassis on the BMW E21 and ALPINA B6 E21. Expect tight body control, crisp response and confident stability without ruining ride comfort.

We run B8 units on our own builds and many customer cars. Feedback is consistently glowing. Sharper turn in, better rear end composure on B-roads, planted motorway manners and a real uplift in confidence on fast-road setups.

What you will feel

• Shortened travel design keeps lowered cars in the sweet spot of the damping curve
• Gas charged monotube construction delivers consistent, fade resistant control
• Firm and fluent ride quality that suits spirited driving and daily use
• Direct bolt-on replacement for tired OE units on the rear axle
• Pairs ideally with performance spring kits and sport suspension packages

Fitment summary

Designed for the rear of BMW E21 models and ALPINA E21 applications, including:

• BMW E21 3 Series 315, 316, 318, 318i, 320, 320i, 320/6, 323i - 06.75 to 03.84
• ALPINA B6 E21 2.8 - 03.78 to 03.83

Technical details

• Position: Rear axle
• Design: Monotube, gas charged
• Shock type: Spring-bearing damper
• Mounts: Bottom eye and top pin

Why enthusiasts choose this setup

• Improved traction and stability when pushing on
• Flatter cornering and reduced squat
• Confidence inspiring control on fast A-roads and track taster days
• Individually road tested by Bilstein for the platform

Compatibility check

We confirm suitability before dispatch. Add your UK registration or the last seven characters of your VIN at checkout and we will verify this rear damper fits your exact E21 or ALPINA B6 application.

Professional installation

We recommend professional fitting. For installation in Warwickshire, MJ Modifications can help. Request a quote: info@mjmodifications.co.uk.

Part numbers and identifiers

• Part number: 24-184618
• Also referenced as: Bilstein B8 rear damper E21
• EAN: 4025258498528
• UPC: 651860498522

Trusted by drivers

Genuine Bilstein kit supplied by enthusiasts. Our customers consistently report a more composed rear end, cleaner transitions and better feedback from the chassis on classic BMW E21 builds. If you are refreshing a retro 3 Series or fine tuning a fast-road setup, this is the proven rear shock to choose.

Search terms to help you find the right part

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