For the budget minded individual, APR is pleased to offer software and hardware utilizing an APR proprietary customized version of the factory Borg Warner K04-64 turbocharger. Originally equipped on VAG’s high output models, such as the Golf R, TTS and S3, the APR K04 Turbocharger System offers a substantial leap in power and torque all with excellent response in a OEM style, compact design. Expect lightning fast response, smooth daily driving and power that transforms the vehicle into a new class of enjoyment.

The APR K04 Turbocharger System features many upgrades over the 2.0T’s factory equipped IHI turbocharger, making it an excellent upgrade. The integrated turbofold design features a cast stainless steel exhaust manifold and turbine housing, integrated into one single unit. This design aids in turbocharger spool while the stainless steel construction is capable of withstanding higher exhaust gas temperature for longer periods of time than lesser materials, such as cast iron. The CNC-machined, billet aluminum compressor wheel and higher flow exhaust turbine wheel expand the turbo’s efficiency range, allowing for higher output across a wider RPM range.

Using 98-octane fuel, the APR K04 Turbocharger System produces an astonishing 348 horsepower and 342 ft-lbs of torque. Unlike the factory turbocharger, power stays strong and doesn’t dramatically taper towards the vehicle’s new 7,100 RPM redline. Switching to APR’s 100 octane race fuel mode, peak power and torque climb further to 363 horsepower and 387 ft-lbs of torque. APR’s calibration experts have safely maximized the full power potential of the turbocharger unit, while keeping reliability at the forefront of their calibration strategies.

Requirements and Recommendations

• Intake System
  

  APR's software is designed to utilize the factory mass airflow (MAF) sensor and housing. The Carbonio Stage I and II Intake System is highly recommended and required to meet the advertised power output.

• Exhaust System
  A high flow downpipe exhaust system is required. APR Recommends a full turboback exhaust system for maximum performance.
• Intercooler System
  APR highly recommends an upgraded intercooler system to meet the advertised power figures.
• Transmission
  The APR K04 Turbocharger System greatly increases torque over the factory output levels and as such, an upgraded clutch may be necessary to transmit power to the ground. APR highly recommends upgrading the factory clutch to one that suits the operator's intended driving style.
• Spark Plugs
  APR's software is designed for use with NGK BKR8EIX spark plugs gapped to 0.024" ±0.002" or 0.6mm ±0.05mm with a change interval of 10-15,000 mi or 16-24,000 km.