Originally Posted by swamp2
This point is already well settled. BMW NA web uses weights with driver. The 3300 lb figure does not include driver (that's a huge difference). It may or may not include ~40 lb of savings from CSiC brakes. If BMW is being honest it should not need the brakes to be 80 kg lighter than a similarly equipped E92 M3. That latter is nearly an exact quote from BMW M on the cars weight.
weight quoted was based on the standard brakes per bimmerposts interview with BMW execs. it was also based on 90% fluids I think.
I'm thinking with full options, an M4 will be 3,430 at most, sunroof (est 50lbs), CCB (-18lbs per BMW execs), DCT (54lbs est. based on current E9x figures), HK sound (10lbs est based on standard vs. enhanced system on E9x), other misc options (10lbs), + full fluids (18lbs). Based on the e9x, I don't see the 18 vs 19" wheel would effecting curb weight.