How can I improve throttle response without compensating fuel efficiency in my 2003 VW jetta GL?
Is there a way to improve gas mileage A: Put a more free flowing exhaust on it. It will free up some hp. And get a cold air intake, Then put some Bosh Platinum Plus 4 plugs in it and u will fell a big difference. I don’t know about the fuel efficiency though u can’t really get more power without loosing some fuel efficiency.