First off, I know this isnt a car forum but I don't want to go through the hassle of finding one and then registering there when I know this isnt that hard of a question to answer. Okay, so I got a used Oldsmobile Alero 2001, and I want to install a new muffler to make the "turbo engine sound." It is just a single pipe, but nowhere in the manual does it say the size. I noticed that there are different sizes, such as 2.25in, 2.5, 3, so I don't know what to get. Also, it says welding is the means of installation. So my main question(s) is - What size muffler should I get, What is a good brand for making "that sound," and also, should I take it to a car shop to get it installed? Thanks for anyones response! I wanna see em trying to catch me ridin' dirty.