My exhaust is leaking slightly from where the Y pipe meets the down pipe. My brother (old owner) said someone told him that there was a rubber donut gasket in there that is worn out and needs to be replaced then it will be fine. Is this true? I know it needs an o2 sensor badly (looks org.). I know also that the pipe right before the cat was welded and don't know why? Could the cat be pluged and cause that Y pipe and down pipe to seperate due to back pressure? I Just need to know thoughts becasue i will be under there tonight anyway. On the o2 sensor, whats the best brand?

P.*. I crawled under there and kicked the cat a few times and I know there was no rattling.

It'* actually a lead donut.. and they can burn up and leak from time to time. Should be cheap....very cheap.. under $10

Backpressure shouldn't be an issue on it.

AC Delco is the only O2 for you.

Ok on the donut, what about the bolts, they look really rusty, I am thinking they will break, is it a special bolt, like one with a spring, or will my hardware store have suitable stanless replacements?

Stainless won't hold up to the stress of heat cycling.

Use OEM bolts from the dealer (I had to replace them on one of mine for the same reason). Soak them liberally with PB Blaster a day before removal.

Glad to see your back!

Thanks for the info.....