Besides the cars themselves, this may be the best product that BMW sells. What I really respect about this upgrade and BMW, besides the sound, is if this is only a 5hp improvement it is the most bonafide 5hp I have ever seen.
2011 Alpine White BMW M3 Coupe 6-speed Manual w/ ZCP.
2008 Alpine White 328i Coupe 6-speed Manual/ BMW Performance Exhaust/ M6 Wheels. (Retired)
Future owner of a Jetson's fold-up briefcase car. So I can TRULY park worry free.
"what I'm driving here...is an ending." Jeremy Clarkson