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I don't know about you guys but I think the two (or pair) on GARRYFINN's avatar look pretty darn nice to me. I just don't think four would look right! If that's your GF or wife you are a very lucky guy.
Flowmaster lists double outlet polished tips on its web site. Looks like they would work but check with a muffler shop to be sure. Personally I would like bigger tips, even 4" if possible, on the stock exhaust.... But on the stock exhaust. Believe it or not but I want quiet!
Personally, I like the way your set up looks. If you like the sound, so much the better. I kinda of lean towards the quad tail pipes looking a little kitschy. My only caveat is that the NPP option actually makes the second pair functional - which helps. In your case, you obviously don't the NPP option.
Bottom line, either leave it as is or put on the quad pipes. But if you do the latter, find yourself a pair of NPP mufflers.
If you like them, great. But they are far too small! Magnaflow tips are a full 4" and are just abut perfect, my opinion of course....!!! And that filler, lose it. Looks Mickey Mouse.