Re: Quiet -- stock like sound level -- turbo back exhaust
Tomei exits left side... it's a really nice exhaust but it's loud. If I could have something just like it but half as loud I'd be happy. If I was to change anything I'd either put a new muffler on it or sell it for a Q300 single and possibly replace the Q300 muffler with something else.
Anyways, the shape of the Y or T does matter a lot, it's the discontinuity that causes the resonance and is the reason the "dual exhaust" has these issues. Corsa and others use Helmholtz or other resonators designed to eliminate the bassy drone sound so in their case the shape of the split doesn't matter as much.