"If it is aluminum then it will fail for sure as aluminum cannot take the strain of the belt over the areas not supported by the bearing, it gets brittle due to these stresses and breaks." -onehundred80 There is a lot of info about why they fail all over the forum. But then again, there are members who have good luck with them. It was mainly their 62mm pulley failing due to the size, so now EC's 62mm is made in steel. I still don't understand why they don't make their 65mm in steel. They never responded to me on why. I played it safe and just ordered this one:
https://www.crossfireforum.org/forum...2-c32-amg.html

Email him. He takes $400 including PP fee's. It gets shipped from Poland. Make sure you get the steel one. He offers them in aluminum or steel.

Mercedes AMG C32 SLK32 Chrysler Crossfire SRT6 SRT 6 Smaller supercharger Pulley | eBay

^^Here is his eBay link. Its $460 going that route. But if you email him and not go through eBay it is cheaper.