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.
No on said flately that it will blow out in 9 months - Mr. busman76 talked to one of the sales reps and asked him for recommendations on suespension and thoughts about it and that how the converstation started. From there the sales person let him know that typically 12- 15 months was the typical customer life for OEM shocks with lowered springs.
I would agree, there hasn't been enough studies done with EDC equipped vehicles, but I believe the basic suspension concepts still apply with the shocks.