I've got an afe cai and the apr x1 installed.
Also got the dt long tubes and the dt pipe bomb y-pipe.
I've a got a magnaflow cat back with a second magnaflow muffler installed just after the y-pipe.
It sounds okay, fairly loud but not obnoxious.
The only annoyance is a higher pitch drone/rattle between 2500 & 3000 rpm that I'm almost positive is coming from the y-pipe.
Options I've come up with:
1) Exhaust wrapping the y-pipe
2) cut & install new resonators on the "pipe bomb" y-pipe
3) Do #2 and cut the y-pipe at the flange & feed into a dual-in/single-out muffler and then a single pipe back to the 2nd muffler
4) Do #2 and cut the y-pipe at the flange & feed into a dual-in/dual-out muffler and then two pipes back to a 2nd dual-in/single-out muffler
So some variations of a dual exhaust but not a true dual, I've heard true duals don't work well on n/a tacos.
thoughts, comments, etc.