Ethanol is rocket fuel for your B9 S4, S5, RS5, RS4, or SQ5. Our iE TrueFlex Sensor Kit is the required hardware upgrade to convert your 3.0T or 2.9TT engine to flex fuel. The sensor hardware allows your factory engine computer to read and instantly send the ethanol content of your fuel to our advanced TrueFlex tune, unleashing huge power.

Upgrading your 3.0T to TrueFlex is simple. Follow our step-by-step guide to install the sensor kit, then flash the TrueFlex tune with your PowerLink app. Fill up with either premium unleaded, E85, or any mix in between and enjoy maximum performance. You can monitor your ethanol content right on the app.

TRUELFEX REQUIREMENTS

• Requires iE B9 3.0T or 2.9TT POWERlink Tuning Suite
  
• Requires iE TrueFlex Sensor Harness Kit 
• Requires iE upgraded HPFP for maximum power

Features:

• Plug-&-play kit for iE B9 3.0T & 2.9TT TrueFlex Tunes
• Includes everything needed to install
• Reliable real-time ethanol content readings
• Run premium 91/93 up to E85 on one tune
  

What's Included:

• Integrated Engineering TrueFlex Sensor Kit

Fitment Notes:

• TrueFlex tuning is available for North American 2017-2024 B9/B9.5 S4, S5, RS5, & RS4 & SQ5 models. TrueFlex tuning is not currently supported for Rest-of-world (ROW) ECUs (Europe, Asia, Australia, etc.) for S4, S5, SQ5.