I have test pipes on my 93 currently and my OEM cats are super nasty and rusted out. OEM cats are to expensive I was looking at getting a high flow type 300 or 400 cell. I cant seem to find anybody selling them or any company selling them. Does anybody know if its wise to get them and or where I can? Also is it bad for me to have test pipes since I am N/A, someone brought up to me that I could be losing back pressure. I am not sure of much but all I know is I need something to replace my test pipes.