What is the size of Chevy 4.3 v6 exhaust manifold stud bolts.?

The size of the exhaust manifold stud bolts on a Chevy 4.3L V6 varies slightly depending on the year and specific application. However, they are generally 7/16"-20.

It's crucial to verify this with a measurement of your own bolts before purchasing replacements. Don't rely solely on this information. The length will also vary, so measure your existing studs to ensure you get the correct length.