APR Audi A4 B7 2.0T FSI Longitudinal S3 K04 Conversion Package

APR's S3 K04 Turbo Conversion is now available for the 2005.5-2006 B7 model generation Audi A4 2.0T FSI. APR has developed an excellent entry level turbocharger upgrade for the 2.0T FSI engine by incorporating the OEM turbocharger assembly from the Audi S3 and coupling it with APR’s FSI Fueling Technology and expertly recalibrated engine management upgrade. APR's Engineering Team has developed a powerful and reliable turbocharger upgrade that maintains OEM engine bay appearance and offers up to 118 hp and 131 lb ft of torque over the OEM power output of the 2.0T FSI.

Reliability, drivability, stealth and enhanced performance that cannot be bested are the highlights of APR's newest OEM-component based conversion package.

APR's engineers have expertly recalibrated the engine management system to allow for nearly flat torque delivery from 3000 RPM to 5500 RPM which results in a smooth linear pull throughout the power band. Keeping the track enthusiast in mind, this conversion package will not result in overpowering of the driveline but will allow for smooth acceleration to easily maintain control while cornering.

The Borg Warner K04 turbocharger selected by VAG engineers is perfectly sized for the 2.0 liters of displacement to allow for stout horsepower numbers as the RPMs increase with no dramatic fall off as redline approaches. This ensures plenty of power in the high RPMs for continued acceleration in the straights and positioning at the healthiest portion of the power band after corner exit.

Featuring APR's Patented EMCS program switching functionality and DirectPort Programming, APR's Engine Management Calibration for this conversion package allows for a range of Octane and situation specific calibrations to be installed simultaneously on your vehicle's ECU. These programs and features are able to be cycled through via your existing factory cruise control and activated in less than 20 seconds. You will be able to choose 1 to 4 Programs listed below.

S3 K04 Conversion Package

S3 K04 Conversion Package

Turbo Installed

S3 K04 Turbo Insalled
Program Mode Horepower Torque RPM Limit Speed Limit
*It is essential to ensure your vehicle is filled with at least the minimum octane rating for each Performance Calibration when activating the program.
¹Figures created using Stock Intercoolers, Full APR Exhaust with Testpipe and APR/Carbonio Intake
Stock - OEM Operation 200 HP 207 LB-FT 6800 RPM 127 MPH
APR 91 Octane (R+M)/2 312 HP¹ 328 LB-FT¹ 6800 RPM Unlimited
APR 93 Octane (R+M)/2 318 HP¹ 338 LB-FT¹ 6800 RPM Unlimited
APR 100 Octane (R+M)/2 TBA TBA 6800 RPM Unlimited
APR Valet Limited Output Limited Output 4500 RPM 70 MPH


  • APR DPP ECU Upgrade Specific to the S3 K04 Turbo Conversion
  • APR Audi S3 K04 Turbocharger Assembly
  • APR High Pressure FSI Fuel Pump
  • OEM Audi S3 FSI Fuel Injectors (4x)
  • OEM Injector Install Kit (4x)
  • OEM Manifold Gasket & Nuts (5x)
  • OEM Exhaust Gasket, Bolts (3x), Washers (3x) & Nuts (2x)
  • OEM Downpipe Gasket, Studs (2x), Bolts (2x), Washers (2x) & Nuts (4x)
  • OEM Turbo Oil Gasket
  • OEM Turbo PCV Flange Gasket
  • OEM Engine Oil Gasket
  • OEM Vacuum Line Crimp Clamp
  • OEM PCV Crimp Clamp
  • OEM Crush washers for Turbocharger Oil and Coolant Connections (10x)

Stealthy OEM Appearance

  • Plug and Play with OEM Intercoolers (Upgrade Recommended)
  • Plug and Play with OEM Exhaust (Upgrade Recommended)
  • Plug and Play with OEM Intake (Upgrade Recommended)
  • Plug and Play with OEM DV
  • Plug and Play with OEM PCV Lines
  • Plug and Play with OEM EVAP Lines
  • Plug and Play with OEM Coolant Lines
  • Plug and Play with OEM Oil Lines
  • Plug and Play with OEM Turbo Support Brace
  • Easy Install
  • 100% Reversable

Dyno Performance

93 Octane Dyno Chart
91 Octane Dyno Chart

91 Octane (R+M)/2 Dyno

93 Octane (R+M)/2 Dyno

NOTE Do not be fooled by claims from lesser tuners, a transmission reflash IS NOT Required to achieve the advertised power claims with an APR ECU Upgrade.

Installation can be performed at any APR Dealer and all parts necessary for the installation except for fluids are included. For best results APR highly recommends the following components in order: APR Testpipe or High Flow Catalytic Converter, APR/Carbonio Carbon Fiber Intake, APR Catback Exhaust system and an Upgraded Intercooler System.

S3 K04 Conversion without APR Fuel Pump (Includes Software)
Vehicle Year Engine Transmission Drivetrain Part Number Price  
Audi A4 2005 - 2006 2.0T FSI All All T2100010Call
*This pricing is for customers who already have an APR FSI Fuel Pump, which is REQUIRED with this upgrade.
S3 K04 Conversion with APR Fuel Pump (Includes Software)
Vehicle Year Engine Transmission Drivetrain Part Number Price  
Audi A4 2005 - 2006 2.0T FSI All All T2100009Call

Phone: (+44) 0208 681 0208 Address: APR Tuned, 40 Haling Road, South Croydon, Surrey, CR2 6HS

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