21mm Rear Anti-Roll Bar

The Ultra Racing Rear Anti-Roll Bar (UR-AR21-265) is engineered to enhance the handling dynamics of BMW 3 Series (E46), Z4 (E85), and Z4 (E89) models manufactured between 1997 and 2016. This 21mm solid sway bar directly impacts lower suspension performance by tying rear suspension components together, effectively managing oversteer and understeer. It helps maintain a flatter profile during cornering, especially at high speeds, and works synergistically with strut tower bars for improved stability and response. Constructed from a single piece of welded steel with no bolted joints, this anti-roll bar features a durable powdercoated white finish, which is standard for Ultra Racing products. All necessary hardware, including bushings and brackets where applicable, is included, ensuring a straightforward installation process that requires no cutting or welding. The product also comes with a Limited Lifetime Warranty against manufacturing defects. This brace is specifically compatible with a range of BMW models including the E46 (318i, 320i, 323i, 328i, 330i, 325i) from 1997-2006, the E85 Z4 (2.5L Roadster) from 2002-2008, and the E89 Z4 (3.0TT) from 2009-2016. It is crucial for customers to confirm their exact chassis code, engine variant, and drivetrain match the provided compatibility list before ordering. For those unsure about fitment, contacting the seller with a VIN is recommended. It is important to note that Ultra Racing products are often designated for race or off-road competition use only, and their legality on public roads is the sole responsibility of the consumer. Additionally, while most installations are straightforward, vehicles with high mileage, body damage, or significant age may experience chassis flex that could require minor modifications for perfect alignment.