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That N63tu is just a great tuner engine!! Solid time badblack550xi!!
I planning similar mods for my F15 X5 xDrive50i. TTFS(Frank Smith) Tune and K&N Dropins.
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2011 E90 335i xDrive 6AT Performance Edition Package, M-Sport, TTFS Tune, VRSF 3.5" Catted DP, Active Autowerke CP, Turner Motorsport Strut Tower Brace, Hawk HP+, Bilstein B6, Alpina B3 TCU Flash, K&N ----
2014 F15 X5 xDrive50i M-Sport, RSE, 3rd Row
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