CAP Intake System for Audi B9 S4/S5 3.0T & RS4/RS5 2.9TT

The best intake in the world for the 2.9/3.0 Turbocharged V6 engine. Bar none.

The CAP V2 Intake for the B9 Audi S4/S5, RS4/RS5 is engineered with one goal: move more air, more efficiently, than anything else on the market. Designed from the ground up using advanced CFD analysis and real-world testing, this intake system delivers measurable performance gains while setting a new benchmark for airflow capacity, sound, and fitment.

Featuring the largest air filter and largest velocity stack available for the B9 platform, the CAP V2 Intake maximizes airflow volume while maintaining smooth, high-velocity air delivery to the turbocharger. The result is improved throttle response, faster boost onset, and stronger power throughout the RPM range, all with OEM-level reliability and no need for a tune. 

What sets our intake apart:

• Massive 8-Inch Performance Air Filter
  Featuring 53% more surface area than leading competitor options, the oversized filter supports extreme airflow demands without sacrificing filtration efficiency.
• CAPFlowMax Proprietary Filtration Technology
  Developed exclusively for this intake, CAPFlowMax balances maximum airflow with superior filtration, ensuring clean, dense air enters the turbocharger for consistent power and long-term reliability.
• Largest Velocity Stack for the B9 Platform
  The biggest and highest-flowing velocity stack in its class smooths airflow entry, increases velocity, and reduces turbulence — maximizing performance gains at any power level.

Engineering & Development

• CFD-Optimized and Flow-Tested – Designed using advanced airflow simulations to deliver proven performance gains backed by real engineering.
• 3D-Scanned Engine Bay Modeling – Every millimeter of available space is utilized to maximize airflow and ensure precise fitment.
• Multiple Design Revisions – Refined through numerous iterations to perfect airflow, sound, and installation.
• Built for Durability – Corrosion-resistant construction designed to last a lifetime, even under extreme driving conditions.
• OEM Mounting Integration – Reuses factory rubber grommets with CAP hardware for factory-like fit, filter isolation, and reliability.
• Sealed Heat Shield Design – Weather stripping and an integrated bracket system keep the heat shield securely in place and isolating the filter from engine bay heat.

Sound That Demands Attention

The CAP V2 Intake doesn’t just perform, it transforms the driving experience. Expect aggressive turbo spool, sharp throttle response, and an intake sound that delivers supercar-level induction noise under load, without sacrificing daily drivability.

Designed to Scale with Your Build

Whether you’re stock,  have a tuned setup, or considering a big turbo in the near future, the CAP V2 Intake is engineered to support airflow demands well beyond factory limits — making it the last intake you’ll ever need for your B9 S4/S5, RS4/RS5.

Turbo Inlet Fitment

This intake is designed to fit OEM-sized turbo inlets only and is not compatible with aftermarket inlets that differ from factory dimensions.

You can pair this intake with our new and improved V2 Style Turbo Inlet, which is specifically designed to complement our intake perfectly, ensuring optimal fitment, smooth airflow, and maximum performance gains.

Lifetime Warranty

The CAP B9 S4/S5, RS4/RS5 V2 Intake is backed by our CAP Lifetime Warranty, ensuring your investment is protected for as long as you own it.

Warranty Disclaimer
Please note that the air filter is considered a wear-and-tear item and is not covered under the lifetime warranty.