Audi RS4 Air Filter - APR - High Flow, Cotton-Gauze (2007–2008). This direct-replacement panel filter improves airflow while maintaining excellent filtration for your B7 RS4.

Using APR's proprietary cotton-gauze media, this washable, reusable element is flow-bench optimized to reduce pressure drop compared to the factory paper filter. It fits the stock airbox (263 x 211 mm), supports crisper throttle response, and can add a subtle induction note, all while remaining compatible with emissions equipment. Designed for the RS4's 4.2L V8, it works well on stock or modified cars and helps the intake perform more efficiently.

Features

• High-flow, proprietary cotton-gauze; washable and reusable
• Lower pressure drop than stock; flow-bench optimized
• Direct drop-in for 2007–2008 Audi RS4 factory airbox (263 x 211 mm)
• Improves throttle response; may slightly enhance intake sound
• Works at any stage of performance; no negative impact on emissions

Have questions or planning an install? Call our Austin shop at 512-982-9393 or our Los Angeles area shop at 562-981-6800. We offer installation and customization services at both locations.

If you're purchasing multiple items, contact us for potential shipping discounts. We install on premises at both locations.

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