Well unfortunatley, I didn't read the last two post till now and I forgot about the gasket. I have the stock pipe down and o2 sensors swapped over. I have had the prochamber since 04 and managed to loose all the nuts ofr the connections so I need to get those tomarrow as well. Should I go to ford dealer for the gasket or local auto parts ok? The only one I found local in stock is a walker brand and it's $13. Figures the felpro is 4.99 and out of stock. Biggest problem I had was getting the front o2 harness disconnected, and well the hot ass pipes. I was impatient and wouldn't let it cool down. All should be well and back together wed night. Btw she is LOUD with the midpipe dropped. I just had to once!