Z4 turbocharger kits are released by DA MOTORSPORT.

http://www.da-motorsport.com/projel.../turboz4_en.htm

First mass produced turbocharger kits for the Z4.

E46 and E36 turbocharger kits are coming too...

The turbocharger kits fit Z4 2.2L, 2.5L and 3.0L. All have different software.

http://www.da-motorsport.com/projel.../turboz4_en.htm

Very cool, but your links don't work, and this should be moved to the Z4 forum.

try this www.da-motorsport.com