I have a 99 gsr and i'm looking for an rsr ex-mag exhaust...i wanna know if a muffler from an exhaust for a civic ex would fit the gsr...i know that the si muffler would work but i didn't know if the ex one is different. I'm looking at buying an ex-mag muffler for an ex...so if someone could let me know asap thatd be awesome, thanks!