I just took the steel sealing ring off and used 3 bond 1211 to seal the pipe. Has worked great for me. Make sure your flange is super clean on the inside and outside first. I have not found an aftermarket flange that the CT pipe fits into. As far as springs, I think I ended up using banshee exhaust springs by the flange and maybe brake pedal return springs for the 2 pieces of the pipe? Can't remember exactly