AST Monoball Front Thrust/Control Arm Bearing - E9X / E8X
The AST Monoball Front Thrust/Control Arm Bearing Kit replaces factory rubber or polyurethane with solid, low-friction bearings that eliminate deflection and sharpen your suspension geometry under load.
Built for serious track cars and drivers who want a direct connection to the road, these bearings maintain accurate alignment even under extreme cornering, braking, and acceleration.
Features
- Precision-engineered spherical bearings eliminate unwanted movement and flex
- 6061-T6 aluminum housings, CNC-machined for perfect OEM fit
- Low-friction PTFE-lined bearings for smooth, noise-free operation
- Direct replacement for OEM control arm bushings
- Designed to withstand high cornering loads and extended track use
- Developed and tested by AST Suspension — trusted by race teams worldwide
Why Upgrade
Factory rubber bushings are built for comfort, not control. Under cornering load, they flex — changing toe and camber mid-turn. The AST kit locks that geometry in place, improving steering feedback, tire wear, and overall chassis response.
Ideal For
- Track and time-attack builds
- Performance street cars
- Drivers who demand consistent alignment and steering feel
Installation Notes
Professional installation recommended. Pressing tools or a hydraulic press may be required. Re-align vehicle after installation. Includes tool for pressing into control arm.
Fitment: All RWD E9X & E8X Models