I see what you mean about the drone or getting on and off it. I love the deep growl, and it sounds awesome when winding it out, but there definitely is a decent amount of drone when on the hwy. I took a 500mi trip yesterday up to Canada and the entire way up the NY Thruway seemed like it was a long slow uphill kind of road, and had the cruise set at 75, and was turning about 2600-2800RPM. Since it wasnt just a flat road, and that long uphill kind of one, the throttle was always just down a little more so it really droned and kinda gave me a headache...still love it, but that bugs me. If you backed off the throttle just a bit it would go away, but we'll see what the return trip has in store, since it seems like it will be mostly downhill

As for the rattling noise, below is a pic of where there pipe on the left, as lookign from the front of the car, is almost touching the crossmember that is below the tranny. The shop made some adjustments, and put a little extra bend or space in the pipe and the buming or rattle is gone now.
<a href="http://s15.photobucket.com/albums/a384/sysadmin1/?action=view&current=IMG00079.jpg" target="_blank"><img src="http://i15.photobucket.com/albums/a384/sysadmin1/IMG00079.jpg" border="0" alt="Photobucket"></a>

 

AHHHH Why are Borla Cat backs so expensive??? I was thinking of just getting a muffler but then i decided just to go for it all! I have been looking at borla cat backs and its 1000+ Will they fit a X sedan though? I have a 05 g35x and I was looking at megan racing cats but they won't my car because of the AWD.

 

wow, stupid old thread bump.

I have one for a sedan, with x pipe ( cost me 200 to install)
I can sell it you for a lot less than 1000 pm me if you want it.

 

good sounding