did you read this:
http://www.e90post.com/forums/showthread.php?t=503714?
335i are 10s cars with jb4 with METH. (which i stated i am not running METH)
this guy is running jb4 STOCK doing 11s all day like i said. he also ran with meth which put him in 10s.
google jb4 you'll see stock times 11s all day on 100 octane.
i am not stock
add on FMIC+BCI+JB4
jb4 has maps 1-7 adding anywhere from 40whp-120whp depending on mods. most people run map 3 (60whp gain).
and 135i isnt that faster than a 335i maybe by a bumper. depends on driver for that one
i will not lie im mediocre at the track so maybe i can probably do low 12s like you said.