I just installed the White Brothers Header Pipe with the E2 series pipe on my 02 426 bike. The header and back pipe do not fit straight together in the middle, which is creating a small space. A small amount of air is coming throught this space. Has any one had this issue with the White Brothers setup? I called White Brothers and they suggested to use a PERMATEX High Temp RTV Silicone Gasket Maker, which will seal the small space. Any suggestions? Should I use this Silicone or should I try returning the header pipe?