Belt Tensioner Assembly ACDelco 38164, New In Box, N.O.S. Box is dirty, parts are new. You don't install the box so... Best price on the net as far as I can find. 

We sell by part number, You are responsible for fitment. The catalog and photos are provided by ebay and may contain errors. We cannot control this. We do the best we can to make the sure the parts are in good condition and that they are correct but errors can occur. Please do not order if you are unsure that its the proper part. Feel free to contact me if you have any questions and I will do the best I can to answer them.

A quick note on shipping, I usually ship things very quickly after payment during the week, weekend orders usually ship Monday. I like shipping with the post office usually, they seem to be the fastest and cheapest overall. I sometimes recycle old boxes and packing materials so long as they are in usable condition. It saves you and me money. We sometimes ship things in the factory box if we feel it is strong enough, we usually add packing materials to protect your purchase.
I always use tracking numbers. ALWAYS

I ONLY SHIP TO ADDRESSES PROVIDED BY EBAY.  If you send me a note to ship to another, I will still ship to the address provided by EBAY or I will void the sale. If your address shows as invalid by EBAY, I will void the sale. I do the best I can to ship items as quickly as possible, sometimes upgrading the shipping at my own expense. Poor information will cause delays all around. I also do this to prevent fraud. PLEASE MAKE SURE YOUR ADDRESS IS CORRECT BEFORE ORDERING AND CAN ACCEPT THE SHIPMENT!