Ok guys....So got some time to check out the exhaust just now and low and behold the two bolts holding the down pipe up to the 02 housing are GONE

The whole pipe was just chillin out there not even connected!
Anyone know what size the two bolts are so I can go pick em up? Also is there a gasket between these two? I didnt have a flashlight so couldnt see if the gasket was still there or not.