AST Suspension Coilovers – Ford Focus RS (Mk2 – DA)
5100 Street – Inverted CO (No Top Mounts)
$5,175.00
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AST Suspension Coilovers – Ford Focus RS (Mk2 – DA)
ACU-F1105S
$5,175.00
Why Choose AST Suspension?
AST Suspension is engineered in the Netherlands and trusted across motorsport, fast road, and competitive racing. Every coilover is built around a precision inverted monotube design, delivering responsive damping control and consistent performance from the street to the track.
From the 5100 Street Series through to the 5300 professional motorsport setups, each AST system is matched and tuned for your exact chassis — giving you the right balance of adjustability, comfort, and outright performance for how you drive.
As an authorised Australian distributor, AST Suspension is backed with local warranty support and in-country servicing, so you're never waiting weeks for overseas returns.
- Inverted Monotube Design — Precision construction for responsive damping and consistent performance on road and track.
- Engineered in the Netherlands — Developed through decades of motorsport experience and OEM collaboration.
- Full Range of Series — From 5100 Street to 5300 professional motorsport, a setup to suit every application.
- Adjustability Options — From 1-way to 3-way damping, with separate high & low-speed compression on the 5300.
- Fully Australian Backed Warranty — Comprehensive warranty supported entirely within Australia.
- Local Servicing & Rebuilds — Fully rebuildable and serviceable in Australia, no overseas shipping required.
- Matched & Tuned — Each system is set up for your exact chassis before leaving the factory.
| 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 |