Hey man congrats! I Remember when I came to your spot to grab those stock rims and told you the 335i is such a blast...now you got one and can relay to others how I felt when I first had the car
Recommend tune at minimum as first engine/performance mod...
As far as the BOV...It was one of the first mods I got in my car but ill be honest its all for show and NO go....Especially with a 6MT you lose any boost you built through every single shift...At this point I wish I had gotten a chargepipe build for upgraded diverter valves instead of a BOV..be smart unless all you got the 335i was for showing off...then by all means handle it!!!!