2017-2024 CAP 8" Intake V2 | B9/B9.5 Audi S4/S5, RS4/RS5
Rated 4.9 out of 5 stars
15 Reviews
Lifetime Warranty
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- Product Description
- Vehicle Fitment
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- Install Video
- Review / Sound Clip
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:
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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.
2017-2024 CAP 8" Intake V2 | B9/B9.5 Audi S4/S5, RS4/RS5
Sale price$299.99 USD
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2017-2024 CAP 8" Intake V2 | B9/B9.5 Audi S4/S5, RS4/RS5
Sale price$299.99 USD
Rated 4.9 out of 5 stars
15 Reviews
CAP V2 Intake Pressure Simulation – B9 S4 / S5 / RS4 / RS5
CAP V2 Intake Pressure Simulation – B9 S4 / S5 / RS4 / RS5
Our pressure analysis confirms the CAP B9/B9.5 Audi S4, S5, RS4/RS5 V2 Intake delivers a smooth, balanced airflow path with minimal pressure loss from the air filter to the turbocharger inlet on the B9 S4/S5/RS4/RS5 platform. By eliminating turbulence and abrupt transitions present in the factory intake, the system maintains a strong, stable air charge under load, allowing the turbocharger to operate more efficiently.
This optimized pressure management results in improved throttle response, more consistent boost, and reliable power delivery throughout the RPM range.
Key Advantages:
• Even Pressure Distribution – Reduces pressure drop and increases turbo efficiency.
• Reduced Flow Restrictions – Optimized transitions allow air to move freely no matter your power level.
• Performance-Focused Design – Maximizes airflow at stock turbo levels and as well as big turbo builds.
For enthusiasts pushing the limits, pairing the CAP V2 Intake with CAP’s turbo inlet and upgraded charge pipe kits ensure this optimized airflow is fully converted into maximum performance gains.
CAP V2 Intake Bottleneck Simulation – B9 S4 / S5 / RS4 / RS5
CAP V2 Intake Bottleneck Simulation – B9 S4 / S5 / RS4 / RS5
The bottleneck simulation highlights how the CAP V2 Intake eliminates common restriction points found in the OEM B9 S4/S5/RS4/RS5 intake system. The redesigned intake path maintains consistent cross-sectional area and smooth airflow transitions, preventing choke points that can disrupt airflow at any power level.
• Upgraded Turbo Inlet – Improves airflow into the compressor housing.
• High-Flow Charge Components – Reduces downstream restrictions.
• Molded intake tube for perfection – Creates a seamless airflow path throughout the intake tube.
Together, these enhancements maximize efficiency and help extract the highest possible performance from the B9 S4/S5/RS4/RS5 powertrain.
By reducing bottlenecks near the turbo inlet, the CAP V2 Intake ensures the turbocharger receives a steady, unrestricted air supply — resulting in stronger, more consistent performance under all driving conditions.
CAP V2 Intake Velocity Simulation – B9 S4 / S5 / RS4 / RS5
CAP V2 Intake Velocity Simulation – B9 S4 / S5 / RS4 / RS5
The velocity simulation demonstrates how effectively the CAP V2 Intake accelerates airflow from the filter to the turbocharger inlet. The refined geometry promotes high-velocity, stable airflow stream while minimizing turbulence, ensuring the turbocharger is consistently supplied with fast-moving, dense air. To maximize the effect of our intake, we highly recommend the use of CAP’s inlet alongside of this intake.
This improved airflow velocity translates directly into sharper throttle response, quicker boost onset, and stronger midrange power — especially noticeable during aggressive driving and throttle input.
Key Advantages
• Efficient Airflow Acceleration – Smoothly builds velocity without inducing turbulence within the intake system.
• Minimal Flow Disruption – Streamlined design maintains consistent airflow speed throughout the intake tract.
