My friend and I are doing custom 2.5" piping on my 1999 Audi A4 1.8T and I want to know what muffler to use with it? Obviously it has to have 2.5" inlet and preferably dual outlets no bigger than 2.5". I am open to use a muffler with/without tips already on it, but want to find something that will not sound like a Honda, but will have a nice low sound. Brand and model # would be helpful as well so I know exactly what will work in my application. TIA.