I just installed my greddy evo tt exhaust with topspeed resonated test pipes. It does not have much rasp unless I floor it, but it seems to be a significant amount louder than my old setup with 2 apexi mufflers and 2 resonators with x pipe.

However it does have a deep note with more of a defined engine sound.

Just wondering if this is the normal sound of the greddy evo tt or do I have a leak?

Its pretty quiet at idle but while driving it gets loud.

 

That sounds about normal for the evo tt.. If you worried check your seals.

 

It's definitely normal. I had the GReddy Evo TT exhaust for like 2-3 months on my current SC setup and it was VERY loud. It's an awesome looking exhaust with the Ti tips but it is very loud on a NA setup. This exhaust is designed with bigger piping for a TT setup, hence the TT in the name. I eventually sold it and went with Fast Intentions cuz it was a bit too loud.