I also painted the muffler black and masked off the tips. I like it a lot better, i'm not much a fan of the big shiny muffler thing for a number of reasons, primarily attracting unwanted attention from LEO's.
I have a 3" CMPE system as well. Mine is old, i got it 2nd hand, and i don't recall if the guy i bought it from got it new. In any event, piping is 3", uses a magnaflow 3" in/out. It uses the Y-Pipe style twin tip. Maybe CMPE only recently started using twin tip mufflers for their 3" systems. /ubbthreads/images/graemlins/dunno.gif