Franklin and I just finished installing these on my 1M. Not as tough as I thought it would be, but definitely a 2 person job. Using an iPhone app I measured -2.4. Next step is to take it to an alignment shop to measure the range of adjustment.
2011 1 Series M Coupe/VO/Convenience Pkg/Premium Pkg/Harman Kardon/AFE Scoops/Berk Midpipes/P3 V2/BMS Catch Can/CF Rear Deck Spoiler/3M Clear Bra/3M Crystalline/Homelink/M Performance Steering Wheel