hello. I asked this question in the exhaust forum and I didn't get an answer, so I ask here. To reduce CO2 I am looking for a catalytic converter for my fbody

1990 V6. I have found some with a tube to put an air tube…but currently mine does not have it. where does the tube go? any photos? Any recommendation?

 

Some cars had the AIR pump that blows air into the exhaust manifolds and catalytic converter and some cars didn't. If your car does not have the AIR injection emission control then you would simply cap off that tube.

 

I thought all 3.1s from 90 had the air pump but I guess i was mistaken

 

Leave the tube on the cat-con capped off. The 3.1s only run air to the passenger side exhaust manifold.

RBob.