it would have been blowing like crazy if there was no gasket on there suerly!
It was blowing a little, but I think that will probably have been the springs needing changing.
I would do if I was decatting, but don't want to with it being pre-CAT just in case.
If you're taking it apart to do the mani/cat kit, you might want to seal up the cat join to the exhaust whilst you're at it. Otherwise be prepared....
there's 2 washers missing, but they're not really needed anyway!