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Save 10% or $140 + on New UNITRONIC ECU and TCU Tunes*
Save 10% or $140 + on New UNITRONIC ECU and TCU Tunes*


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When equipped with the proper software, tuning, and intake/exhaust systems, this turbo can be use for 300 reliable horsepower. The ultimate upgrade for those seeking boost on a budget.

The KO4 flows much more air than the KO3 and will provide a significant increase in horsepower. Additionally, fuel injectors with a higher flow may be required if using this kit for custom installations - Get in touch for all the parts required for your KO4 upgrade


  • Upgrade for MK5, MK6, and Beetle and Passat models with a BPY, CCTA, or CBFA engine.
  • BPY, CCTA, CBFA Performance Upgrade - Does Not Include Necessary Software or Plumbing Needed for Proper Function on these engines.
  • Direct replacement for Golf R

Borg Warner - Transfer Case Identification –