New member about to be an owner of a 2005 Grand Prix base.

Hello every one. I have already started learning from you guys.

I have a few issues that seem common to this car.

rack-pinion leaking around rubber boot.
Oil pan looks like it is leaking
Throwing P0420 code.

I will wait to see if the Rack is leaking seriously before replacing/repairing.
Same with Oil pan,

I would like to go cat less and tune to remove the code