Well guys I got my exhaust installed this morning.
First the good:
The back half was pretty well spot on. Everything lined up right and worked ok. Since I have SC GFX, I can't run the pipes straight out the back so we had to shorten the back part to move the muffler back from the bumper cover a bit so he could do a turn-down.
Now the bad:
The X-pipe lined up ok, but it's pretty much impossible to make it a slip-fit. One really needs ball & Socket clamps. Also on the front part of the X-pipe, its very difficult to get the pipes on. You have to put them on then raise the whole front half up into the car. I had that part welded so it's not coming back apart.
And the UGLY:
The down tube on the passenger side is WRONG! Anyone out there who bought the front half of this system should definitely test fit this piece first and decide whether you want to return it or "make it work". I chose to make it work. The angle of the downtube is off a bit, so the side of the cat is physically touching the starter. In addition to that issue, the O2 bung is pointed straight at the bellhousing where the starter mounts, making it physically impossible to get the O2 in there. I think even if you installed the O2 and raised the downtube, it would still hit. It's definitely not right and not something you can fix in your driveway without a welder. I had my exhaust guy cut the pipe off just after the cat. That allowed us to rotate the cat just enough to allow the O2 to clear and stop the cat from touching the starter. Then he modified that downtube to align with the new location of the cat and re-welded it. While we were looking in the end of the cat, we also found that they pushed the pipe too far into the cat housing, This causes a lip inside the cat all the way around. I'm sure this will catch airflow and cause turbulence inside there. I'm not sure how crucial that is, but there wasn't much we could do about it.
Overall impressions, It's a good system from the X-pipe back, very nice bends and I'm sure it flows well. I do have quite a drone around 1400~1800 rpm that I really dont like. Since I have 373 gears, I'm at 2200rpm @ 70mph so it's not too bad on the highway, but cruising around town I'm in that rpm range a lot. I will probably ditch the X-pipe and go back to a small mid-mount muffler to cure that.
Here's a pic showing where the O2 is pointed right at the bellhousing.
And here's where the cat was touching the starter.