Hey guys... X5 Rookie here and new to the board. I pulled my SprintBooster V2 off my 550i two days ago and plan to install today on the E70. Currently the E70 response is terrible.

ahhhh, much better. How it should be from the factory.

That's what I thought too when we still had bare pavement. Now that we have about a foot and a half of hard packed snow and ice, I'm mainly using 10 to 15% throttle so nothings fun. Such is life in the great white north.

maybe I missed it being discussed but do you guys remove the SB before bringing it into the dealer each time? How long does it take?

I sold my version 1 and got the Version 2. V2 has a switch which allows you to turn it off, half power and full power. The grin was back on my face as soon as I pulled out the driveway.

Installing and removing takes less than 5 minutes. When I had it on my 550 I only removed it the first 1-2 service visits; after that I left it on. One thing I did was keep the allen wrench in my car JUST IN CASE.

Some people say it worthless and that's their opinion. For me, I prefer it on and with the V2 it's much easier to disable it from the switch when I valet or have my GF drive the car.

Oh. So you remember the "gismo" from a few years ago that, I believe, Ground Control was selling?