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      07-12-2011, 06:49 AM   #2
BMWZ4
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Drives: '11 Z4;'15 X3 & '14 x328i
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You could have a look at these folks.....they seem to be offering something for the N52 engine. Not much gain in the hp or torque though, for the money at least.

http://www.esstuning.com/products/N5...-Software.html
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'11 Z4 sDrive 30i; Space Grey, Coral Red Kansas, 6MT; Fully optioned & '15 28i X3 Fully Loaded; Loaded '14 x328i