muffler question

[sahuddleston]

hey guys, right now ive got a otto racing muffler, i found a TRD muffler and if i get it im going to get 2.5 inch piping from the cat back as well. should i get the cat removed and get a dummy o2 sensor too? will the sound and performance of the TRD muffler with new piping be dramatically different than the otto and stock piping? ive already got the resonator removed ...... any advice or insight would help

[StockSolara]

If you get the CAT removed the sound should be a lot louder. . . I think your otto racing muffler might be louder cause of the design unless its the same design as the TRD Muffler

[SleeperSolara]

The Otto will be loud i think.
You should think about the TRD is a good choice, but i would keep the O2 thing cause it will throw a code if you tired to get rid of it.
TRD will be little louder with the 2.5" pipin' from the cat.