I know who U R.
Agreed I had to cut off the bolts that connect the catback to the Catylitic converter.The install after that was easy.I was just able to install my dp without removing the cowl. Took about 2 hours without really rushing. The o2 sensor does have to be removed to get the heat shield off which gives access to the 2 top nuts. 75% of the time was taking the factory setup off.