I just had this setup installed in my 09 135i and I am very pleased with the result. There is a very minimal increase in NVH and the shifter seems much more precise with the engine/trans a bit more firmly mounted.
Bought them from Turner Motorsport:
https://www.turnermotorsport.com/Car...salesrep=cmars
Also, I work at Turner. Let me know if I can ever help you with parts for your 1-series