I'm not sure what so hard? I knew that I wanted to keep a rear muffler similar to the size of the OEM rear muffler with a similar inlet/outlet position! I've done mock up fitment using construction paper (thin cardboard) to see how much room and clearance was available. I assembled the piping kit made reference marks for support hooks, flanges, etc. If you feel you can't handle it let a muffler shop install it! Or call some orgers for help...Anyone in TX can get with me. If you don't live in TX bring your car and I'll build you an exhaust system using the TruBendz kit, and same Magnaflow mufflers I used to build my exhaust! I'm game if anyone is interested! This is not hard! You can always buy a cheap eBay system and fit them with the mufflers and resonators you prefer or leave as ordered!