has anyone used a BMS powerbox?

[03ozwhip]

Trying to decide if I should get one of these, is it worth doing? should the car be tuned professsionally after it's installed to get the most of it?

I still have warranty on my car for a year, I don't want to mess with that, so what do you guys think?

[03ozwhip]

No one?

[benyl]

What car? Seems like a waste of money.

I used a JB+ on a 335i. That made a huge difference.

[03ozwhip]

128i. I'm hearing differing opinions..

[LUCKYSTRIKE]

That's the NA 6 cylinder yeah? Don't imagine you'll get much more power out of that.