Intermediate Pipe Help..
you could also go to a muffler shop and see if they would bend up a transition piece from the ypipe to the stock exhaust. 3in to 2.5in reducer
are you inststalling the muffler yourself? i went the same route you did when i first got my car and just bought a magnaflow muffler. it cost me about $230ish for the install total. i should of just saved up another 100 and bought the catback. which i eventually did about a year later. i dont think your going to find a I-pipe that will go from a 3in y-pipe to a stock exhaust. i dont know, i might be wrong.
it will be worth it in the end even though your paying more now. and at least you will have a full 3in exhaust now. believe me, i went the cheaper route and i just ended paying more in the long run.

