I got a d15b7 mildly modded and i want to upgrade the exhaust, i was thinking about getting a RSX type S muffler and have an exhaust shop bend and weld a 2" piping....what do you guys think of this? yes no maybe so? or maybe another muffler like 06/07 Si muffler? 2000 Si muffler? GSR muffler? idk i need help on which one wont be so restictive flowing.