034 Billet Aluminum Rear Subframe Mount Insert Kit, B9/B9.5 Audi A4/S4/RS4, A5/S5/RS5, Allroad

Audi B9 rear subframe insert kit for improved handling and rear-end stability

The 034Motorsport Billet Aluminum Rear Subframe Mount Insert Kit is designed for Audi B9 and B9.5 models to reduce unwanted rear subframe movement and improve overall handling precision. The factory rubber mounts can deflect under load, leading to a vague rear-end feel and less consistent suspension geometry.

These precision CNC-machined billet aluminum inserts fill the voids in the factory mounts and limit excess movement without compromising ride comfort. The result is a more controlled and connected driving experience, especially when cornering or driving aggressively.

Unlike softer materials, billet aluminum maintains its shape over time, providing a long-lasting improvement. The inserts are engineered to work with the factory rubber mounts and have been thoroughly tested to ensure optimal performance and ease of installation.

• T6-6061 billet aluminum construction
• Precision CNC-machined components
• Fills voids in factory subframe mounts
• Reduces subframe movement under load
• Helps maintain proper suspension geometry
• Improves rear-end stability and response
• Virtually no increase in cabin noise or vibration
• Works well with upgraded sway bars and suspension setups
• Easy and fully reversible installation

What’s included:

• Front insert pair
• Rear insert pair

Note: Factory bolts can usually be reused according to torque specifications. Optional new hardware requires N91228001 and WHT004756A.

Example compatible models:

Audi A4 2017-
Audi S4 2017-
Audi RS4 2017-
Audi A5 2018-
Audi S5 2017-
Audi RS5 2018-
Audi allroad 2017-