Audi S4 Strut Tower Brace - APR - B9 Chassis - Black (2018-2025). Purpose-built to stiffen the front end for a more connected drive.

APR replaces the factory stamped aluminum brace with a high-strength tubular chromium-molybdenum steel design. A cross-bar links the strut towers, and a built-in turnbuckle lets you set preload. With 25 mm OD/19 mm ID tubing, billet end caps, clean TIG welds, black powder coat, and stainless hardware, it resists flex in hard cornering and acceleration while keeping daily comfort and low NVH. Expect crisper turn-in, improved stability, and confident feedback without sacrificing everyday refinement.

Features

• High-strength Cr-Mo tubular construction with black powder coat
• Adjustable preload via integrated turnbuckle
• Reduced flex and sharper steering feedback
• Direct bolt-on install; no cutting or permanent mods

Questions or fitment help? Call our specialists at 512-982-9393 (TX) or 562-981-6800 (CA). We offer installation and customization at our Austin, Texas and Los Angeles, California area locations.

Buying multiple items? Contact us for shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov