I got a couple of exhaust adapters (extension pipes) from the local auto parts store about 3 inch inlet 3 inch outlet about 4 inches long that I'll be cutting so that the tips come out just a bit more.
But I have to wait for spring (car is in the garage sleeping for the winter and is too effin cold to do any work).

 

Interesting.. good thinking, Cubes! Didn't think they sold that for some reason. I'll swing by an auto shop and see if I can copy you

 

It will be quite a bit louder with ART pipes. But damn does it ever sound siiiick

I wanted Nismo S tune for the longest time, I'm so glad I ended up with TDX and ART. As the OP said, I go drive now with radio off and windows down just to listen to it.

 

It IS louder with ART pipes haha. Sounds amazing. Can't compare to anything but a GTR. Here's a few revs from me, they're low revs but once I go past 3500 RPMs it screams.