Front Exhaust manifold Bolts?

Hello I'm replacing some exhaust parts on my daily commuter 06 Aveo LT with roughly 188k miles. Im hoping to get another 30-50k out of the car, within the next year or so, so I am heavily relying on it.

Im replacing the front exhaust manifold, the catalytic converter and the front pipe and both o2 sensors.

I cant seem to fine the proper bolts for the front exhaust manifold or the catalytic converter. What part number are those?
For the exhaust manifold mounting bolts, I'm assuming its similar to this: https://www.summitracing.com/parts/r...b/applications
But thats for a Ford....

And the image doesn't show the bolts either: https://www.gmpartsdirect.com/auto-p...-manifold-scat

Will an 8.8 grade bolt, be good enough to hold the Cat? Im not too sure it can withstand the heat. If not, what grade or bolt is recommended?


Thanks in advance!

Well I've done some digging and found the later Aveo exhaust manifold studs
https://www.ebay.com/itm/NEW-Genuine...-/192236969752
or part number: 24454371

Now to find the 2006 versions....