If you are taking bms stage 1 it's pretty similar to race chip. I run race chip and like the feature of being able to increase boost. Don't think you can do that with the bms.
All star 1 piggy backs are the same with max increase of boost.
My race chip drives like stock with some addded power. Def noticeable but nothing like my bm3 on my m4. The BM3 full tune completely changes the way the car drives. Feels nothing like stock drivability which I actually don't prefer
Always had plans of going full tune on the x5 but changing my mind.
You can't go wrong with either bms or race chip. Race chip packages their product better with better housing and cables are oem quality
Quote:
Originally Posted by jmorgan911
Thinking about tuning the X5M. Have the Eisenmann exhaust installed.
Any pros/cons for going with either of these tunes?
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