Custom Cat back exhaust.

Well i was going to do headers but i decided to go with a better collector and cat back setup. My older brother is a master mechanic and i had him help me build this exhaust setup. We cut the exhaust off at the collector and made a 3" pipe. from there we welded in 1 high flow spun cat 3" inlet 3" outlet. The o2 sensor front was installed into same exact location as stock with a toyota style 02 bung and a second o2 bung at the rear 6" from the rear of the cat. Then 3" all the way into a flow master series 40 muffler 3" inlet and 3" outlet double offset inlet\outlet. So far no engine light but i do have a rear o2 sim from urd in case. It's loud just the way i like it. Give it a listen for yourself.
https://www.youtube.com/watch?v=mSqMcKw9Gt4