Originally Posted by FStop7
Anyway, what **********s is saying has some fundamental merit, but there is not nearly enough mileage on the E9x M3 to determine the long term durability of the EDC or non-EDC shocks and struts with stiffer springs. Many people have run stiffer springs on E46 M3s for years without any appreciable, accelerated wear on their shocks. There are M5 and M6 owners with EDC equipped cars who have not had issues with stiffer springs, and they've been running them for a few years now. It's certainly prudent to caution a potential customer that accelerated shock wear is a risk associated with stiffer springs, but to flatly tell him that his shocks will be blown out "in 9 months with normal driving" is stupid.
100% agree. It's definitely not something to panic about.
OP: Install the springs and go have some fun in your M3. It's the key basis behind the passion of modding our cars.