after I installed my headers and ORY on the A4 T/A. I lost power since im still running a stock tune one a A4. and my MPG went to total CRAP!!!! I get less than half of what i did with just a lid and cutout. Do you think it is a Tuning issue that can be fixed with HPTuners. I have access to a WB
If so, what do you suggest I do ??

thanks

 

yes....