Here is how the system was built--I watched while Richie did his magic. I built the 3-inch exhaust on my last car and it took me three weeks. If you do it yourself with no previous experience, expect it to take a while. The key is to take your time, measure twice and cut once, have stands to hold the system in place, get someone who can butt-weld tubing, and walk away if you get frustrated. As a tip, I duct taped the entire system together when I built my own then took it to be welded.