I just installed some Leistung resonated secondary cat bypass pipes on my '09 GTS. I had fabspeed pipes on my previous '06 S, but with the baseline more aggressive note on the GTS, I am glad there is a resonated option.

I HIGHLY recommend this mod.

In normal mode, there is really no difference in the exhaust sound at the lower rpms and/or while cruising. In sport mode, especially above 4000 rpms, the sound is simply spectacular. You will have a **** eating grin on your face every time you hit the accelerator. It is just soooooo good !!!!

With the resonators, there is no rasp whatsoever. It is a wicked and powerful growl, and yet it never sounds cheap or distasteful.

Very glad I did this mod and very glad I went with the resonated pipes on the GTS. There is also a small gain in both power and torque. Nothing earth shattering but enough that you notice. This was true with the fabspeed pipes on my '06 S also.

 

Glad to hear!!! You should hear it with the LMS exhaust! lol.

 

Enjoy! I felt the same way after I installed mine (though non-res).