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Chassis Components› Chassis and Frame Components
APR Tuning
Strut Tower Brace (B9) Fits Audi A4 17-25, S4 18-25, RS4, A5 17-25, S5 18-25, RS5 18-25 APR
SKU: A0CU SUS00027
Moderate — 2–4 hours
Overview
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Part #: SUS00027
Introducing the APR Strut Tower Brace (B9 Chassis - A4/5, S4/5, & RS4/5)
Features:
- Increased Chassis Rigidity - Reduces flex under load for improved suspension performance and handling stability.
- High-Strength Tubular Cr-Mo Alloy Steel Construction - Stronger than the factory-stamped aluminum brace for maximum strength and durability, featuring a black powder-coated finish for superior corrosion resistance and lasting performance.
- Full Strut Tower Integration - Connects both towers and the firewall for superior structural reinforcement.
- Adjustable Preload with Turnbuckle - Fine-tune chassis stiffness to optimize handling for different driving conditions.
- Improved Steering Feel - Enhances driver feedback and consistency during aggressive driving.
- No Compromise on Comfort - Engineered to prevent additional NVH, maintaining a smooth and refined ride.
- Direct Bolt-On Installation - No cutting or permanent modifications required, making installation seamless.
- High-Quality Materials - Constructed from durable 25mm OD / 19mm ID high-strength tubular chromium-molybdenum alloy steel with billet end caps, TIG welding, black powder coating, and all stainless steel hardware.
Fits Audi A4 17-25, S4 18-25, RS4, A5 17-25, S5 18-25, RS5 18-25
Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Fitment
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Specifications
| Brand | APR Tuning |
| Part Number | A0CU SUS00027 |
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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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