I have a 2009 Mazda 6 I sedan that I just bought over a year ago. It has a 2.5L, 4 cylinder engine, I want to make it faster but I don’t know where to go or what to do in order for it to have a real difference in my speed. I know that some other cars similar to mine or the same as mine come with a 3.7L, 6 cylinder engine. Could I get that and swap that with mine or something like that? Can someone here help with telling me what other engines I can get that fit the car or what engine that comes with a turbo I can get to make my car significantly faster or the 3.7L, 6 cylinder engine other question I had please? Thank you.