Chevtrucks88

I sawed off my exhaust on my 97 Chevy Silverado PIckup about a year ago, and now i want to put either leg pipe dual exhausts, a cherry bomb, magna flows,or glasspacks, basically anything to make it loud without destroying the gas mileage. So my question is, can i still do that? and how? If there is something else you think I should put on, feel free to let me know. I just want something that is low, loud, and on the cheap side. thanks!