TGK Motorsport Audi EA824 V8 4.0T Flex Fuel Kit enables Audi 4.0T twin-turbo V8 engines to run any blend of gasoline and ethanol, including E85, for increased performance and flexibility. This plug-and-play kit features a Continental ethanol sensor, OEM-style wiring harness, and PTFE braided lines for reliable fuel monitoring and seamless integration with compatible tuning software. Designed for Audi A8, S6, S7, S8, RS6, and RS7 models, it unlocks the full power potential of the EA824 4.0T platform.
$689.00
The TGK Motorsport flex fuel kit is a plug and play solution to adding flex fuel on Audi 4.0T Vehicles. Use of this kit is to add the ability to run anywhere from straight gasoline to E85 Blend as well as reveal the true power potential of your setup. Forced induction scenarios especially benefit from the use of ethanol, and these allow you to seamlessly switch between gasoline and ethanol without having to monitor your fuel content or reflash your tune.
This kit uses:
PLEASE NOTE: It is possible to install this kit without tuning, but to gain the most out of the kit, as well as to automatically mix blends, the kit and harness is mainly setup to use Dyno Spectrum Tuning DS1.
Vehicle Compatibility Chart
| Year | Make | Model | Engine | Chassis |
|---|---|---|---|---|
| 2012–2018 | Audi | RS6 | 4.0T | C7 / C7.5 |
| 2012–2018 | Audi | RS7 | 4.0T | C7 / C7.5 |
| 2012–2018 | Audi | S6 | 4.0T | C7 / C7.5 |
| 2012–2018 | Audi | S7 | 4.0T | C7 / C7.5 |
| Engine Platform | Compatible Models | Years |
|---|---|---|
| Audi 4.0T Twin Turbo (4.0TT) | RS6, RS7, S6, S7 | 2012–2018 |
| Chassis | C7 / C7.5 | 2012–2018 |


















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