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 M3 xDrive (G80, G81) (2021+)
- BMW M4 xDrive (G82, G83) (2021+)