If you wanna reduce the raspy sound, I suggest you get a header, or do some work on the stock manifold. I have the one that has the two downpipes feeding into the catalytic converter. There is a funnel that collects two exhaust ports and funnels it into one of the two downpipes. You can dremel down the connection between the funnel and the downpipe. (It is a really poorly done pipe-in-a-pipe weld that has mega overlap.) Believe me, this will reduce 50% of your raspiness! (I guess I have too much time on my hands.) Some have said an aftermarket header turned their intake growl into a melow purr. You just need to buy the header gaskets before you remove the manifold. (less than 8 bucks) Aside from the tight-fitting heat shield, removal and reinstallation is the quick and easy part. If you have a dremel and time to dremel down some pipes, then do this first! You could also try lining the inside of your intake pipe with some felt.
