BMW M5 - Wikipedia
BMW 5 Series (E60) - Wikipedia
BMW M5 (E60) Specs & Photos - 2005, 2006, 2007, 2008, 2009, 2010
M3 GTS, BMW Wiki
BMW 7 Series (F01) - Wikipedia
Bimmerforums - The Ultimate BMW Forum
BMW M5 (2003), Forza Wiki
M3 E46, BMW Wiki
BMW S85 - Wikipedia
M3 E92, BMW Wiki