I don't know much about mechanics or welding, but when the car was on the lift at Midas the welds looked really good and they said it looked like a very well done job. There was absolutely no rust.

 

It's an x-pipe and then a dual split and yes it was a V6. I had it installed in Vegas last July. Since you have a V8, I think you'd probably want to go with the V8 Magna Flow- I would. Robbie and I are going to meet up soon to talk about everything.

 

After having the Gibson catback installed last week, took a few days to get used to the sound, not anymore, love the ROAR. Need to attach my gopro to the back and get another video out. Wife was in it yesterday too for first time since install and loves it, but could have been feeding my ego with it being love week

 

An "X" pipe is exactly that -- a pipe shaped like an X. Cars with "real" dual exhaust (usually V8s) have separate exhaust pipes coming from each side of the engine, providing exhaust for each set of 4 cylinders on that side. From there, each pipe flows underneath the car to a muffler/resonator and then to the rear where the pipe exits somehwere around the rear bumper.
This method is usually acceptable for most applications but the sound can be abrasively loud and ragged because of differences in performance and pressures of each bank of cylinders. An X pipe smoothes out the noise by balancing the back pressures, which also improves performance. It is installed under the car and attached to the exhaust pipes after they leave the engine so that exhaust from both pipes flow and mix with each other then split to continue to the muffler/resonator and out the back.
Just as dual exhaust improves performance by allowing better breathing for the engine, the X pipe improves it a little more by balancing the back pressures.
It also looks cool when you do wheelies and everyone can see your undercarriage. :-)

 

Realistically you probably won't see much for gains, as you're not rolling around in an 800HP tuned racecar.

 

not really it only closes down 2 to 3 inches. it still came out of 2 nd gear at 125 MPH

 

Of course. All of those parameters are already programmed into the computer system. Just because it did the same thing, doesn't mean your engine didn't have to work harder to do it.