The Tamil version managed to retain the slickness of the original. The voice actors selected for Hrithik Roshan and Abhishek Bachchan carried the gravitas required for their roles. Consequently, a new generation of Tamil viewers who may not watch Hindi films in theaters often seek out this version. This demand is exactly what drives traffic to piracy websites.
Isaimini is not regulated. Clicking on "Download Now" buttons often leads to: dhoom 2 tamil isaimini
If you don't want to use Isaimini, here are some alternative platforms to watch or download Dhoom 2 Tamil: The Tamil version managed to retain the slickness