Make the moose (V70II T5) legs?

Dear community, my OHL and I each drive a V70II T5 (Bauj. 6/2000 u. 3/2002 Aut.) with 190,000 and 202,000 km on the clocks. I carry with the thought both at Wetterauer(make a good impression on the homepage) allow to optimize on approx. 275hp. I admittedly not very technical and wanted to ask you about your experiences (good and bad), or tips or also concerns. I only drive fast if the train is free (this is here in the area of Cologne sel the case or there are speed limits and my better half enjoys the acceleration with their moose (if it has to be faster). On the whole we are not drivers who constantly go to the power limit of the vehicle. Thank you already! forzaandre