I didn't do an X Pipe, but I did a custom catback exhaust setup. The concept is essentially the same though. They took out the 2.25 inch pipe, replaced it with a 2.5 inch pipe for more flow. Then I chose a flowmaster super 44 muffler for the sound, and c4 corvette exhaust tips for looks. A place in the town over from me did the job. With labor and all the parts I told you about the total cost came out to be $250. Probably the best mod I have ever done to a car. Here is my video of how it sounded the day after I got it done