I had been looking around for a belt tensioner to replace my dying unit when I found a listing for it on their site. Skeptically, I ordered one and it showed up a week later and it was the real deal A/C Delco part. Best thing was it was only $78 shipped!! I have since ordered and recieved one more as a spare but it was the last one they had available. Today I ordered another $350 worth of parts. These guys are great to deal with and very reasonably priced. They even put up with me giving the wrong addresses for my card I used on both orders (I have 3 addresses).