I just had 3 of 4 KYB AGX installed into my accord today.
One was defective and needs to be sent back.
WEll I was driving and at some turns and going up or down inclines, I hear noises.
Should I be worried or is this the new shocks settling in?
That one that was not replaced is the stock, and it is busted.

 

What kind of noises? Like metal creaking or some king of clunk?

Yes, it is possible that it's just the springs are re-settling.

EDIT: Why didn't you just wait till you had the 4th strut to install them?

 

Could also be the added stress on your stock shock...
Spring + Badshock = Squeeeek.

 

i would try and get the 4th one on asap, then see if you still have the noises and go from there

 

Yeah, I'm gonna send the 4th one back and at the soonest it will come back for install later this week.