APR Strut Tower Brace for Audi A4/A5 & S4/S5/RS5 (B9) | SUS00027

The APR Strut Tower Brace (SUS00027) is a purposeful performance upgrade for the Audi B9/B9.5 chassis, engineered to significantly increase front-end rigidity. While the factory utilizes a stamped aluminum brace, APR replaces it with a high-strength tubular chromium-molybdenum (Cr-Mo) alloy steel system. By linking both strut towers directly to the firewall and incorporating a cross-brace design, this system minimizes chassis flex during heavy cornering and acceleration, resulting in sharper steering response and a more connected driving feel.

Following the philosophy of "Performance Without Compromise," this brace features an integrated turnbuckle that allows for precise preload adjustments, enabling drivers to fine-tune the stiffness of the chassis. Despite the significant increase in structural support, the system is designed to introduce zero additional noise, vibration, or harshness (NVH), making it an ideal upgrade for both dedicated track cars and spirited daily drivers.

Key Features:

• Enhanced Rigidity: Drastically reduces chassis flex under load to maintain consistent suspension geometry.
• Superior Materials: Constructed from 25mm OD high-strength tubular Cr-Mo alloy steel—significantly stronger than factory stamped aluminum.
• Full Integration: Connects both strut towers and the firewall for a complete triangular reinforcement of the front clip.
• Adjustable Turnbuckle: Allows for precision preload tuning to optimize handling characteristics for different driving environments.
• Improved Steering Feedback: Delivers a more predictable and responsive steering feel during aggressive maneuvers.
• OEM+ Durability: Features a black powder-coated finish for corrosion resistance, TIG welding, and all-stainless steel hardware.
• Bolt-On Installation: Direct replacement for the factory brace with no cutting, drilling, or permanent modifications required.

Technical Specifications:

Installation Instructions