I bought my first supercharged car in Oct. of 2008. A 2007 Grand Prix GT. I was curious about the care and maintenance of the supercharger and what make and model the factory installed. Once I learned my car had an Eaton Gen V M90 I asked around and even talked with a few Eaton Reps and after market rebuilders. Heres the deal, there is no part, component that you can buy to out last, out perform an original Eaton Supercharger part. The reason is the clearences and function of their parts are very specific. In fact the only SC oil that can be used without worry is GM SC oil which is specified and reccomended by Eaton. Those pics don't reveal anything. How do I know that was an original part and the care and maintenance of the SC it came from. I'll stick with the advice of real engineers and mechanics instead of some after market scam artist.