Richard Reventlow

Can I fit a S6 ECU and get 40+ more horsepower? Do I need to fir other changes in settings or hardware?
Not much out there to tweak a non turbocharged motor.

muhammadc

S6 has a different exhaust also... and the different gearing makes a big difference. Good luck changing <b>that</b>.

Bollinger

Any claims of 40HP are likely untrue. Even and intake and exhaust probably won't do it. I'm guessing a camshaft at least.

And as Muhammad says, you have to change the rear end and front end to get real speed like the S6 has.

gio436

I would not try it. The s4 and the a6 2.7 are alike but uses a different chip.