Because it is a P.O.S. "generic kit" put together by people that do not know what it takes to turbo a BMW, much less an X5.

A radiator hose sleeving kit?, high flow breather cap on a closed system?, utter Chinese crap. This "kit" is nothing but bling parts added up to justify the $1650.00 price. Prob 100.00 in the turbo alone and the rest of the parts add up to another 400.00 if that.

Major pieces missing of course are the turbo manifold, and tuning (standalone or otherwise). Not to mention all of the included parts are "universal fit" meaning you are on your own in getting them to fit. Feel sorry for anyone taken in by this supposed deal.