4.0 Y pipe bolt size?

Mine are so rusty they look like a 5mm and my gaskets are leaking so bad it wont pass the test.
Stress of dropping trans must have made them leak when doing steering rack.
Bought gaskets and work has hardware.

What size are the bolts?

 

Stumper

 

I did my best to look for you.
Are you talking about the ones with the spring on them?
If so, Advanced Auto says they carry them.

Parts # 36454

 

Thanks for looking.

I did do the slippery doughnut where the spring bolts are. Need to get a nut on them as the 4 little tangs barely have threads left

Needed the flange bolts on the Y Pipe. I ended up not replacing that gasket as it barely leaks/makes noise.
I did replace the cat to Y gaskets before the O2 sensors. Those came out easy with a 14mm deep. looked like rusted wire loops instead of a gasket.

Seems to be running a bit better now too. Was leaking so bad that I got CEL for a bad CAT when parked idling .