|
I think the gains would be minimal on those water:air units. You aren't going to notice 20whp and I doubt your X5 is either.
The tune is going to be your best bet. Which one are you considering?
__________________
2006 E90 330i (retired)
2009 E90 335i (retired)
2012 E70 X5 50i M Sport (retired)
2016 F10 535i M Sport
|