I'm considering fitting a Remus Poweriser tuning box in a few weeks.
After speaking to a very reputable dealer at the weekend he's assured me I'll be looking at approximately 35ish BHP increase and a solid bump up in torque. The reason I'm looking is because a colleague of mine has recently bought a M140i and it bothers me how quick it is against the M2
Is this return in power realistic? Can anyone comment who has experience of these tuning boxes and give me an idea of how they got on with them?
Apologies, I'm not 100% in touch with the specifics so if I'm asking a silly question I'm sorry!