Cat converters

[96eb96]

My cat converter has a hole. It has to be replaced along with the catback exhaust.

1) What brands did you have luck with - I am considering walker or eastern. I know aftermarket exhaust can be hit or miss...

2) The bolts holding it on look like mushroom rivets, I guess they have be drilled out for new hardware. May not be worth to save the thread on the pipe,

 

[96eb96]

Aftermarket cats do not seem to have studs, but the OEM one shows 3 studs.

Can the what is left of the nuts be cut flush with the Y pipe flange? The upper one looks a bit hard to get too, but there is barely any nut left.

Hard to tell what is threaded. I guess a few love taps with air hammer should separate it if there is no thread.