I noticed that the lancer has two cats, will replacing one make for better flow? I have an exhaust(no piping) that I can put on my lancer but I dont want to have a whole cat back system made, I rather just put the exhaust and possibly replace one of the cats. Any suggestions?

 

Have muffler shop hack off the old muffler and weld on the new one. But I'm worried how that DTM will look on a lancer...can't tell you the last time I saw one like that.