Quote:
Originally Posted by BMWZ4RIDER
I have a 09 35i.
I too was just thinking if it is possible to put a Cold Air intake on the different series of these ZED motors like a K & N Cold Air Intake kit?
Any experience with this upgrade out there?
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i am not sure for 28i but for 35i/35is, the best bang for the buck would be BMS Dual Cone Intake.
http://www.burgertuning.com/dcintake.html
you should do the combo with JB4 which gain about 80-100whp
http://www.burgertuning.com/jb4_pnp_...nce_tuner.html