Hi
I was hoping to get some advice from anyone who has the JB4 N55 stage 2 kit installed on an N55 engine. I have a 335i and have been considering it. The main points I would like to know are, does it really improve fuel efficiency and is the power/torque upgrade noticeable? The 335i is an extremely quick car already but everyone likes more power
I am considering combining this with the Evolution line (ss) exhaust from Akrapovic and would just like some feedback from anyone who has these installed (ideally in combination) or knows anything about them.
Thanks