Thread: TUNE?! F30 335i
View Single Post
      12-22-2012, 09:43 AM   #16
bulldog x6
Major General
bulldog x6's Avatar

Drives: '16 MB GLE
Join Date: Oct 2008
Location: probably work

iTrader: (28)

Originally Posted by RollingLower420 View Post
So what is the safest tune for your engine that has the most HP benefits?

Is JB4 safe for your engine?
the JB is a safe tune but any time you push the output of the engine (stock or tuned) there is always some risk. As long as you are responsible, it should be fine. I had JB on my E90 335 (full bolt on parts too) and drove the piss out of it for 3 years and it held up fine.