Apexi Exhaust/ Do I have Apexi Downpipe

[davidalindsey]

Just wondering if I have the Apexi N1 Downpipe?
Would it benefit me to get the Apexi N1 Downpipe?
Also is this exhaust 3inch or 2.5 diameter?

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[ttetzner]

looks like an aftermarket downpipe, either that or the stock heat shields are gone, can't really tell. Also looks like a 3" catback. the best gain is to delete the cat, find a punishment downpipe, or slowboy one that deletes the cat, they're 125 new shipped.Save the stock one for passing inspection. eliminating the cat with a cat delete dp is good for about 30hp, 25lbs tourqe and drastically improves spool time