Hello guys
During my search for some of the sports pieces of the my e55 w210 I found
Mercedes Benz Power Pulley W210 E55 AMG from Top Speed Pro-1 on ebay

thy say Up to 20HP & 20TQ Achieved via Independent Dyno Testing Depending on the Model



Is there one try this piece or there is better than the original or i
Keep the original What do you advise me?

Yes, I have one of these pulley and it is lighter then the original cast iron one. I think you shed a few lbs of the oem pulley. It does help with the acceleration as the pulley is much lighter. Here is my original thread....
https://mbworld.org/forums/w210-amg/...ft-pulley.html