I have a 2003 Civic LX and I just replace the exhaust with a magnaflow catback exhaust system. I have a silencer in the muffler because without it I wouldn't hear myself think. I have replaced the exhaust manifold/cat with new header (w/o cat). The system is just too loud. How can I make it quieter? Would a resonator help or a universal cat? I don't want to replace the headers with a stock one because it looks better but I can't handle all the noise. Any suggestions?