[VPGNS]

First i want to apologize if this question was already asked on previous threads ...i searched the entire forum and couldnt find anything.

Im planning to get a 28i or 30i but i noticed that there is only the left exhaust output vs the 35i/is has both left and right.

I want to achieve the quad exhaust setup.
What is recommended in achieving this goal? I dont mind cutting the bumper to make it fit.
I also read that you can get a diffuser to hide the cut bumper to achieve the quad setup.

What brand should I be looking into?