I want to know what kind of Cat backs people are running and what size. I wanted to get the 60mm Greddy pipes but i heard they are too big. Its 2.34" if my math and brain serves me right. The stromung is 2" piping which is i think 50mm. I heard of someone having 55mm piping but wasnt sure who. What companies make catbacks or rear sections for my B14 GA16DE??