Originally Posted by mainly
hmm, they should be doing better than that. e63/cls63 do 11.3 with just a tune, stock tires...
well , as i said my car is stock with semi slicks on. and by far through research the majority of stock m5's quarter runs are between 11.7-12.5
the downside of it all was that i couldnt do launch control due to the fact that the car is on full traction off and that causes a lot of wheelspin which made me get a quarter mile of 14 + (even with semi-slicks on)