i've noticed this on more than one MCS, including mine... the stock exhaust is not centered against the rear bumper opening. rather, it's towards the left (driver's side)... why is this?

 

I noticed the same thing on mine...it's one of those 'little' things that drives me crazy!

I've figured out that I can 'persuade' it toward the passenger side and it will stay centered for a short time, but I have to do it again.

 

how did you "persuade" it?

 

The Scientific Answer:
The posterior section of the exhaust was amended by fundamentally influencing it to migrate to the precise center of the opening by exerting the essential degree of force utilizing the substructure of my hand.

The Real Answer:
I gave it a couple good pushes to the right with my hand!