AST Suspension Coilovers- BMW 3 Series (E46) / BMW Z4 (E85, E86)
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Description
Why Choose AST Suspension?
When it comes to elevating your vehicle’s handling, precision, and on-track performance, AST Suspension delivers uncompromising quality engineered for the most demanding drivers. Whether you are carving up local backroads or chasing podiums at Time Attack events, AST provides a suspension solution tailored to your exact needs.
Here is why AST Suspension stands out from the competition:
- 100% Made in the Netherlands: Every AST Suspension kit is meticulously designed, engineered, and manufactured in-house at their state-of-the-art facility in the Netherlands, ensuring world-class quality control and premium construction.
- Fully Backed Australian Warranty: Drive with absolute peace of mind knowing your investment is protected by a comprehensive warranty fully backed right here in Australia.
- Local Servicing & Rebuilds: Downtime is the enemy of any track enthusiast. AST coilovers are fully rebuildable and serviceable within Australia, meaning you don't have to ship your suspension overseas for maintenance.
- Expert Local Support: You are never on your own when dialing in your setup. AST is backed by local support and the suspension professionals at AD Racing Shocks and Racing Shocks Australia, ensuring you get the expert advice you need.
- Comprehensive Motorsport Program: No two cars—or drivers—are exactly alike. AST offers a full motorsport program with extensive customization available to meet every driver's specific requirements, from bespoke valving to custom spring rates.
Key Features & Specifications
AST Suspension Series Comparison
All AST series feature a high-pressure inverted monotube design (for McPherson applications), height adjustability, included springs, and fully rebuildable architecture. The primary differences lie in their adjustability, remote reservoir inclusion, and topmount configurations.
| Feature | 5100 Street Series | 5100 Competition Series | 5200 Series | 5300 Series |
|---|---|---|---|---|
| Ideal For | Fast Road & Occasional Track | Dedicated Track Days & Club Racing | Competitive Time Attack & Racing | Professional Motorsport |
| Damping Adjustability | 1-Way | 1-Way | 2-Way | 3-Way |
| Rebound Adjustable | Yes | Yes | Yes | Yes |
| Compression Adjustable | No | No | Yes (Single adjusting on reservoir) | Yes (Separate High & Low-Speed) |
| Reservoir Type | Internal | Internal | Remote Reservoir | Remote Reservoir |
| Topmounts | Works with OEM Topmounts | Pillowball Camberplates (Front)* & Topmounts (Rear)* ** | Pillowball Camberplates (Front)* & Topmounts (Rear)* | Pillowball Camberplates (Front)* & Topmounts (Rear)* |
| Design Core | Inverted Monotube | Inverted Monotube | Inverted Monotube | Inverted Monotube |
*Where applicable based on chassis design (McPherson suspension will be inverted; double wishbone will be non-inverted).
**Option of Front only, or Front and Rear Camber plate options available.
Vehicle Fitment
- BMW 3 Series (E46) (1998-2008)
- BMW Z4 (E85, E86) (1998-2008)