Originally Posted by carbonguy

I'm a new 370Z owner, coming from an 07 and then an 09 Corvette Z06. I had a switch that controlled the exhaust butterflies in the stock exhaust - could run them open or closed. Of course, I ran them open 95% of the time and loved the sound. The Z stock exhaust sound....not so much.

Here is my question: I realize that sound quality will be different, but does anyone know what size resonator in the FI exhaust will best approximate the loudness (ie decibel level I guess), of the stock Z06 exhaust with the butterflies open? If no resonator, is the sound much louder?

Am think seriously about this exhaust but not sure about the resonator size.