Most anabolic steroids have a positive impact on the metabolism and fat burning but in the case of Trenbolone this is one of the few anabolic steroids that burns fat in a direct manner; it actually directly enhances lipolysis. Tren, as it is more commonly known also plays a very important role the healing and regeneration process; this hormones ability to repair the cells is nearly ten times the amount of most anabolic steroids and as you understand it is the repairing and healing process that promotes enhancement in-terms of growth and strength as well as in the preservation of tissue when calories are restricted.
6-7% is NOT possible. You are delusional. I started my cycle which has a lot more shit in it than yours, and at a lower body fat %, and I will be LUCKY to hit single digit bodyfat. Sorry to be the one to break the news to you, but low-dose tren and really low-dose T3 isn't a miracle drug that's going to make you lose 9% bodyfat in 8 weeks. Bodyfat is not proportional. It's not as easy to go from 8% to 7% as it is to go from 21% to 20%. The best part is that you've never even used these compounds and for some reason you think you can tell me how they're going to work for you.