• Carbon Fiber Air Intake Kit for Audi S4 B5 1997-2002 2.7L
  • Carbon Fiber Air Intake Kit for Audi S4 B5 1997-2002 2.7L
  • Carbon Fiber Air Intake Kit for Audi S4 B5 1997-2002 2.7L Default Title

Carbon Fiber Air Intake Kit for Audi S4 B5 (1997-2002) 2.7L

$336.00
$336.00
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Maximize Induction Cooling for the Audi B5 S4 2.7T V6

Who It’s For: Designed specifically for Audi S4 B5 (1997-2002) owners running the legendary 2.7T V6 biturbo engine.

The Problem: The 2.7T V6 is a powerhouse, but it is notorious for producing extreme under-hood temperatures due to the cramped engine bay and twin-turbo layout. The factory plastic airbox acts like a heat sponge, soaking up thermal energy and warming the intake charge before it ever hits the compressor wheels. This leads to pulled ignition timing and a noticeable loss of torque during spirited driving.

The Solution: We utilize the BMC Carbon Dynamic Airbox (CDA) to create a true thermal barrier for the 2.7T. By replacing the heat-conductive OEM housing with high-grade carbon fiber, we leverage the material’s naturally low thermal conductivity. This kit isolates the intake air from engine bay heat, while the internal flow deflector ensures air reaches the turbos with maximum velocity and minimal turbulence.

Why This is the Ultimate Upgrade

  • Dynamic Over-Boosting: The CDA system uses a frontal air intake and flexible aluminum ducting to create a pressurized ram-air effect, forcing a higher volume of oxygen into the system as vehicle speed increases.
  • Carbon Fiber Thermal Shielding: Unlike aluminum intakes that turn into "ovens," this carbon fiber housing keeps the internal filtration element cool, ensuring the densest possible air charge for better combustion.
  • Washable High-Flow Element: Features a high-performance, reusable filter designed to outlast the vehicle while providing superior filtration compared to paper OEM filters.

Technical Specifications

Fitment 1997-2002 Audi S4 (B5 Chassis)
Engine Family 2.7T V6 Biturbo
Factory Ratings 250 HP / 258 LB-FT Torque (US Spec)
Part Numbers bmcACCDASP-02

Compatibility & OEM Reference

Fits the Following Vehicles:

  • 1997 Audi S4 B5 2.7L V6 Twin Turbo
  • 1998 Audi S4 B5 2.7L V6 Twin Turbo
  • 1999 Audi S4 B5 2.7L V6 Twin Turbo
  • 2000 Audi S4 B5 2.7L V6 Twin Turbo
  • 2001 Audi S4 B5 2.7L V6 Twin Turbo
  • 2002 Audi S4 B5 2.7L V6 Twin Turbo

Interchange Part Numbers:

bmcACCDASP-02, ACCDASP-02

The Performance Promise

Buy with confidence. As specialists in the B5 platform, we know that heat management is the key to longevity for the 2.7T engine. This kit provides the thermal protection your turbos need to perform consistently. Backed by real automotive experts and fast shipping.

Fitment

Make

Audi

Engine Size
  • 2.7L

Year
  • 1997
  • 1998
  • 1999
  • 2000
  • 2001
  • 2002

Installation & Tools

The Wrench Time

  • Estimated Time: 60-90 Minutes
  • Difficulty: 4/10 - Straightforward bolt-on installation, but demands extra care around brittle 20-year-old plastic lines and sensitive electronics.

Tools You Will Need

  • 10mm socket & 1/4-inch ratchet
  • Flathead screwdriver or 7mm nut driver
  • Phillips #2 screwdriver
  • T20 Torx driver (MAF sensor retention)
  • Needle-nose pliers (spring clamp manipulation)
  • Thermal heat-sink paste (if relocating early B5 Ignition Control Modules)
Mechanic’s Pro Tip (The "Gotcha"):
On early pre-2001.5 1997-2002 Audi S4 2.7L models (APB engine code with Bosch MAF), the factory airbox lid integrates two Ignition Control Modules (ICMs / Power Output Stages). These modules require direct thermal transfer to stay cool. If your B5 has ICMs mounted on the airbox, you must mount them to the new kit’s aluminum heat shield using fresh thermal paste; failing to do so will bake the modules and cause severe misfires under boost. Also, treat the accordion hose and surrounding brittle vacuum/spider lines with extreme care.

Phase 1: Removing the Factory Airbox on the 1997-2002 Audi S4 2.7L

  1. Disconnect the Battery: Always start by disconnecting the negative battery terminal using a 10mm wrench to protect delicate electronics and reset fuel trims.
  2. Remove Engine Beauty Covers: Gently pop off the passenger-side and center carbon/plastic engine covers using your hands or a non-marring panel popper to expose the Y-pipe and intake tract.
  3. Disconnect Sensors and ICMs: Carefully press the metal wire clips to disconnect the Mass Air Flow (MAF) sensor harness connector. If equipped with top-mounted ICMs, unclip both electrical harnesses and use a Phillips #2 screwdriver to remove the mounting screws securing them to the factory airbox lid.
  4. Loosen Intake Clamps: Using a flathead screwdriver or 7mm nut driver, loosen the hose clamp connecting the factory accordion intake hose to the OEM MAF housing, and loosen the clamp at the metal Y-pipe inlet.
  5. Extract the Factory Airbox: Unclip the metal retaining clips on the airbox, pull away the upper snorkel ducting, and firmly pull the lower airbox assembly straight up out of its rubber mounting grommets in the inner fender wall.

Phase 2: Installing the Carbon Fiber Air Intake Kit

  1. Transfer the MAF Sensor: Carefully unbolt the factory MAF housing or sensor element using a T20 Torx driver or Phillips #2 screwdriver. Transfer the sensor into the new intake housing, ensuring the O-ring seals properly. Never touch or spray the delicate sensor wire element directly.
  2. Mount the Heat Shield & ICMs: Seat the intake kit’s lower heat shield into the factory rubber chassis grommets. If your vehicle uses external ICMs, spread a thin layer of thermal heat-sink paste onto the module backing plates and fasten them securely to the designated heat-sink bracket using the supplied hardware and an 8mm socket.
  3. Install Carbon Intake Tube and Filter: Slide the silicone transition couplers onto the Y-pipe and the carbon intake tube. Install the high-flow cone filter inside the heat shield enclosure, align the carbon piping to eliminate rubbing against the firewall or A/C lines, and tighten all hose clamps securely with a 7mm nut driver.
  4. Reconnect Wiring & Battery: Plug the MAF sensor connector and ICM harnesses back in until you hear a positive click. Reconnect the battery negative terminal using your 10mm wrench.
  5. ECU Adaptation Startup: Turn the ignition to the ON position (do not crank) for 15 seconds to allow the Bosch Motronic ECU to perform a throttle body alignment. Start the engine and do not touch the gas pedal for at least 20 seconds while the ECU stabilizes idle airflow calculations with the new intake. Check for any vacuum leaks before your test drive.

Disclaimer: This is a general guide provided for the 1997-2002 Audi S4 2.7L. Always refer to your factory service manual for exact torque specifications and safety procedures.

Warranty

All products are backed by our Limited Lifetime Warranty. We stand by our quality. [See terms]
Carbon Fiber Air Intake Kit for Audi S4 B5 (1997-2002) 2.7L

$336.00