i had a small hole right in front of the catalyst converter tried to patch it worked for a bit but it flexed to much and moved, patch broke apart tried again same thing. just took it to top gear got them to fix the problem. was done in 2 hours and they through in a stainless performance muffler with a little roar sounds a lot better and it replaced the hole pipe line from just in front of caty to the rear so solved future holes