Racingline Carbon Fibre Intake System Audi S4/5 RS4/5 B9

The latest Cold-Air Intake System from RacingLine Performance has been specially developed for the current Audi B9 S4, RS4, S5, and RS5, to deliver cold, dense air from outside the engine bay directly to the fuel metering unit.

The result is a noticeable increase in power, faster response, and more efficient turbocharger operation.

⚙️ TriFoam™ High-Flow Filter – The pinnacle of filtration

At the heart of the system is the RacingLine TriFoam™ filter with:

• Triple-layer High-Flow construction

• Excellent filtration + maximum airflow

• The best filtering material on the market

✔️ Hand-made in the UK
✔️ Ready for high power and aggressive driving

🔧 Intelligent OEM+ Design

The system utilizes a clever hybrid approach:

• Retains the original lower Audi airbox

• Adds:

  • a new lid

  • a TriFoam™ High-Flow filter

  • a front intake scoop for cold air

👉 Perfect integration, without compromising fitment and reliability.

⚡ Faster turbo spool and lightning-fast response

Thanks to increased efficiency:

• Turbo spool is reduced by up to 500 RPM (in certain configurations)

• Significantly faster pedal response

• More linear and confident power delivery

In RacingLine's experience, no other intake kit provides higher real gains for these engines.

✨ Carbon fiber aesthetics – visible performance

This is not just a performance upgrade.
The beautiful carbon fiber weave transforms the engine bay into something special every time you open the hood – a true OEM+ finish for a premium vehicle.