Racingline Drop In High Flow Air Filter for B8 Audi S4 | VWR1140S4

Upgrade your B8/B8.5 Audi S4 or S5 with the RacingLine Drop-In High-Flow Air Filter, designed to maximize airflow, improve engine efficiency, and enhance throttle response. This direct OEM replacement is a simple, warranty-safe modification that delivers real performance benefits without requiring a full intake system upgrade.

Why Choose the RacingLine High-Flow Air Filter?

• Increased Airflow & Performance – Replaces the restrictive factory paper filter with a high-flow, reusable Trifoam filter, allowing your supercharged 3.0 TFSI engine to breathe more efficiently.
• Dyno-Proven Gains – Delivers an additional 20Nm of torque, improving mid-range power and acceleration.
• Triple-Layer Trifoam Filtration – Advanced three-layer polyurethane foam provides superior filtration while minimizing restriction—the same technology used in F1 engines.
• Enhanced Fuel Efficiency – By optimizing airflow, this filter helps improve fuel economy while maintaining factory reliability.
• Precision Engineered & Hand-Made in the UK – Constructed to OEM-quality standards with an aluminum-spun, reinforced internal plastic cage for durability.

Direct Fit, Long-Lasting Performance

Designed as a drop-in replacement, the RacingLine Air Filter fits perfectly within your factory airbox—no tuning required. With its non-sealed end and expanded surface area, this filter dramatically increases airflow compared to stock, unlocking a more responsive driving experience.

This part also goes by the following cross reference.

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