Thanks to all those chiming in.
OP: All of our cat back exhaust options (non-res, 12", or 18") will sound louder than the factory exhaust system. The difference really is the interior sound level at cruising speed, and the depth of the exhaust note. All of our options will sound very similar (especially the 12" and 18") at wide open throttle.
Our Non-resonated exhaust system is the loudest option in terms of volume inside and outside the car. It is very exotic sounding and slightly higher in pitch because there are no resonators.
12" resonators help to quiet down some of the interior noise without sacrificing much of the exterior volume. The added 12" resonators help produce a slightly deeper and smoother tone. This is a great middle ground exhaust system in terms of sound level.
18" resonators do the best job of cutting out interior noise at cruising speed and under normal driving. They also produce the deepest and smoothest tone. Even though this
Because your car is a soft top, I would recommend choosing one of our resonated exhaust systems.
If you have any other questions, please do not hesitate to ask.
- Kevin