This is a kit that included all of the hardware needed to install a new catalytic converter / down pipe. The exhaust gasket seals to between the turbo and the downpipe and the included hardware attaches it together. The lower clamp attaches between the midpipe and bottom of downpipe past the catalytic.
This kit includes the following hardware:
Exhaust gasket ~503 * * Two ring sandwich metal gasket.. Ajusa brand