Hey all you 5th genners, got a question. Are all 5th gen mufflers identical? Or do the SE's have a special tip or something? How about the AE's? How about 2K2's? Are they all exactly the same as your basic GXE muffler? Thanks for enlightening me.

Alex

 

All 5th Gen OEM mufflers use the same design. The 2K-2K1 SE models add a tip finisher. According to Nissan, the 2K1 mufflers incorporate larger diameter internal piping than the 2K models, hence an increase of 5 hp from 2K to 2K1. Even if this is true, I doubt you'd realize a difference in performance by installing a 2K1 OEM muffler on a 2K Maxima.

 

2k and 2k1 both have 222, you might have been told the 227 was for the AE which it was due to the slightly better exhaust.

 

I think it may have been the addition of an improved air-induction system(but not sure), and both 2k GLEs and SEs shared the same muffler.