exhaust question Options

[eldrewado]

So I made my own exhaust on my GT. After the stock resonator i upped the diameter of the pipe to 2.25 then it goes into a long glasspack muffler then a downpipe just before the rear axle. I seem to be getting better gas mileage, so i want to keep my flow through design, but its so LOUD. I ordered 2 vibrant resonators I heard one is good and two is better and they are flow through. The question is....Should I build the system resonator-resonator-glasspack,
resonator-glasspack-resonator, glasspack-resonator-resonator, or just leave the glasspack out?

[Syaoran]

A resonator can effectively lower exhaust dB. At least from personal experience, I've heard a straight-through mazdaspeed3, and then the exact same with the stock resonatorS back in place (it comes with 2 from the factory). It is very much quieter with the resonators on it.

I don't know how true that is, but it'd make sense, but I've heard that larger piping also increases exhaust loudness. Vibrant makes good stuff that is pretty quiet when used in conjunction with each other with the right bends in the exhaust as well.

If you have a header with larger primaries, that will also contribute to a much louder exhaust, even more if it's a 4-1 equal length design (AKA all eBay headers for the 5S)