Concerning coils, since it is winter, it doesn't make sense to lower the car at least in my opinion. Also some coils aren't rust proof so all that salt during the winter will be bad for it. Just my opinion.
Current | 2011 E92 M3 - Mineral White, Black
Sold! | 2011 E92 335is - Titanium Silver, Black
Sold! | 2007 E92 335i - Space Gray, Black
Sold! | 2008 E90 M3 - Jerez Black, Fox Red