If i want to get a CP for a 335i 2008 e92 auto, which BOV will i receive the most acoustic advantage from. As both Tial and HKS are the same in performance. Ive always used HKS on my previous platforms (non-BMW) and have never used Tial. I feel i wont even get the same effect as manual vehicles. Anywho, any input is great, also if i do not have a meth kit now but would like to invest in one which option should i get. Again i Apology for the sense of ignorance as i am new to this platform.