APR 2.0 TFSI Valvelift S3 K04 Conversion System

  • APR 2.0 TFSI Valvelift S3 K04 Conversion System (T2100009)
50.00 LBS
APR products from etektuning.com can only be sold and shipped within the United States.
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APR 2.0 TFSI Valvelift S3 K04 Conversion System

APR's S3 K04 Turbo Conversion is now available for the Audi B8 A4/A5 & Q5 2.0 TFSI Valvelift engine. APR has developed an excellent entry level turbocharger upgrade for the 2.0 TFSI VL engine by incorporating the OEM turbocharger assembly from the Audi S3 and coupling it with APR's 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 116 hp and 113 lb ft of torque over the OEM power output of the 2.0 TFSI.

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 2800 RPM to 5000 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.

Optional OEM Exhaust Compatibility

While a full exhaust is recommended for maximum power, If you're in a situation where running a high flow exhaust is not permissable, APR has also developed software specificly to use with your OEM Exhaust system. You may switch between high flow exhaust software or OEM exhaust software free of charge any time you alter your exhaust system.

APR's Patented EMCS Technology

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. You will also be able to add APR Security Lockout, APR Fault Code Erase and APR Anti-Theft features.

Program Mode*Peak HPPeak TQLargest HP Gain Over StockLargest TQ Gain Over StockSpeed 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 measured using Stock Intercoolers, Stock intake and APR RSC Turboback Single Exit Exhaust System.
Stock - OEM Operation 212 HP 267 LB-FT - - 127 MPH
APR 91 Octane (R+M)/2 or 95 RON TBA TBA TBA TBA Unlimited
APR 93 Octane (R+M)/2 or 98 RON¹ 313 HP 367 LB-FT 116 HP @ 5550 RPM 113 LB-FT @ 4950 RPM Unlimited
APR 100 Octane (R+M)/2 or 104 RON TBA TBA TBA TBA Unlimited
APR Valet Limited Output Limited Output Limited Output Limited Output 70 MPH


APR includes all hardware and software needed for a painless install.

  • APR DPP ECU Upgrade Specific to the S3 K04 Turbo Conversion
  • APR Audi S3 K04 Turbocharger Assembly
  • OEM Manifold Gasket & Nuts (5x)
  • OEM Exhaust Gasket, Bolts (3x), Washers (3x) & Nuts (3x)
  • OEM Downpipe Gasket, Studs (4x) & 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 Turbo Oil and Coolant Connections (10x)

Stealthy OEM Appearance

APR's S3 K04 Turbocharger Conversion System is constructed from OEM parts and appears OEM. It's easy to install and 100% reversable. Every OEM part is fully Plug and Play:

  • Intercooler (Upgrade Recommended)
  • Exhaust (Upgrade Recommended)
  • Intake (Upgrade Recommended)
  • Diverter Valve
  • Positive Crankcase Ventilation Lines
  • EVAP Lines
  • Coolant Lines
  • Oil Lines
  • Turbo Support Brace


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.

S3 K04 Conversion - Software Included
VehicleMarketEngineTransmissionDrivetrainPart NumberPrice 
Because of high horsepower and torque ratings, APR cannot recomment use with Audi Multitronic CVT transmissions.
B8 A4 Sedan & Avant N America 2.0 Valvelift TFSI 6MT & Tiptronic Quattro T2100009 $3,499.00  
B8 A5 Coupé & Cabriolet N America 2.0 Valvelift TFSI 6MT & Tiptronic Quattro T2100009 $3,499.00  

Part of the APR Turbocharger System install process requires removal of the OEM Turbocharger. During this process, oil and coolant must be drained and should be replaced to offer superior performance and protection. The APR Turbocharger Systems are now complete turn key solutions, including everything you need down to the oil, coolant and oil filter. During checkout you'll be given the option between Motul Specific 502.00, 505.00 & 505.01 5W40 or Motul Power 300V engine oil as well as Motul Inugel Optimal Ultra Coolant and an OEM oil filter. The Premium Motul lubricant package is included at a much lower than retail price point and the costs are listed below.

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