an 1-2

http://www.ecstuning.com/BMW-E92-M3-S65_4.0L/Engine/Ignition/ES2550769/

http://www.ecstuning.com/BMW-E92-M3-S65_4.0L/News/BMW_E9x_M3_M_Owners_Performance_Products_2008_2009_2010_2011_2012_2013/ES1833372/