What bolt size?
 

I'm having a hard time getting the bolts off the catalytic converter. I've stripped the head of one bolt already and I'm fairly certain that all three bolts are seized and need to be cut off. I'm going to just replace the three bolts with new ones so I am just wondering what size bolts am I looking for or is there a specific kind I should get.

They are M10 bolts. The cat bolts can be hammered out of the flange and you can replace them with M10 bolts.

Be sure to put anti-seize on the threads to help make them easier to remove in the future.

Also, please try to refrain from making two separate threads on the same subject ...


https://www.rx8club.com/series-i-tec...-bolts-257898/

Thanks for the responses guys, and sorry for making double threads. So these M10 bolts, would advanced auto carry them? I have a feeling I'm going to says M10 bolts and they're going to look at me like I have 5 heads.

No, you'll be fine, M10 is a standard bolt size. They are usually in the "help" section. Although everytime I go to an autoparts store for a specific bolt, I wind up at Lowes/Home Depot or to a smaller hardware store, the smaller ones always have the right bolt for some reason.