EM K04-064 and HYBRID K04 is direct plug and play installation,upgrade for PQ35 PQ46 2.0T EA888 Gen1,Gen2 GOLF R/GTI/PASSAT/CC/A3/S3/TT/ TTS We fit a more bigger size milled compressor and turbine wheel.To gain producing extra power. Standard K04 Features: • Max Horsepower 350HP+ • Direct bolt-on • Software recalibration is required • Single parts finely balanced then components assembled and core high-speed VSR balanced HYBRID K04 Features: • Compressor Wheel Material:Billet • Exhaust Housing Material: Cast Iron • Compressor Wheel Inducer/Exducer:48.5/ 61mm • Turbine Wheel Inducer/Exducer:51.6/ 46.8mm • Max Horsepower 420HP+ • Software recalibration is required • Single parts finely balanced then components assembled and core high-speed VSR balanced Fitment: PQ35 PQ46 2.0T Platform Vehicles Engine EA113 and EA888 GEN1,GEN2 Audi A3/S3/TT/ TTS Volkswagen GOLF R/GTI/PASSAT/CC