So I am getting a ss/sc cobalt soon and I have some questions. I have been lurking on forums for some information. The first thing I plan on doing is a heat exchanger but after that I want to add some power however I want to keep reliability and mpg good as well. I was thinking about swapping a 2.9 or 3.0 pulley. Wondering which you guys would recommend for a setup like this and which size injectors I would need. I would have it dynotuned. Also is the oversized belt tensioner offered okay or should I get a smaller belt? Thanks for any help guys, new here just trying to do some research before I do anything.