Walker cat, exhaust flange donut gasket leak?

[CWBenjamin]

I just installed a new bank1 walker cat on my 2003 Jeep Liberty 6cyl.

The gasket that walker supplied with the cat is not creating a seal, and leaks exhaust out of the side...

I also had to cut the bolt and bought new bolts and springs from autozone for 9.99.

So I am wondering, is the donut gasket that walker provides with those cats not big enough to fill the space and create a good seal? It seems to tighten down to just where it nudges up against the exhaust pipe, but if I push a little pressure on it, it will move ever so slightly...

So does anyone know if either those donuts they provide aren't a good fit for our jeeps, or if the bolts autozone supplies do not tighten down far enough before they hit the wide part of the bolt preventing it from tightening further?

bolt set: https://www.autozone.com/collision-...ust-manifold-bolt-spring-35129/276320_61346_0

catalytic converter: https://www.amazon.com/gp/product/B000VKYC6C/ref=ppx_yo_dt_b_asin_image_o00_s01?ie=UTF8&psc=1

Is there any easy fix? RTV? adding a smaller gasket on top of the new one? TIA