I have a 2010 Cobalt LT Sedan, and I am all about hypermiling and ecomodding. But I haven't done anything yet! Haha
I really want to start with an exhaust system. Full, cat back, or maybe just a muffler. I get about 60-80 miles HIGHWAY every single day, so I want to get a higher flow exhaust to help my highway mpg - I have seen all the options for cat backs, and downpipes and such.. But to those of you who have aftermarket exhausts, what should I get?
I'm not going to complain if I get a little more horsepower, but all I want is maybe a 3-10% MPG increase. My driving habits are great, and like I said before I get like 80% highway mileage.
Please reply! I want to upgrade AT LEAST my muffler asap.