that's a good question, but we wont really know until the items are released in the U.S. and added into ETK. I can only assume that the cooling upgrades will be sold individually due to there proximity to the front of the vehicle and the need for replacement in the case of a front end collision. However, the BMW performance exhaust for the 335i sedan includes a separate x-pipe which can not be purchase separately.
15' Msport X3 28i _Mperformance - ACschnitzer - H&R_
15' Sportline X1 28i _Mperformance - H&R - Recaro baby seat_
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