Changed from stock EDC coilovers to AST 5300 and SPL arms, dropped from 1:31 to 1:28 at Streets of Willow Springs
https://vimeo.com/336770027
Video is HD 1080 can play full screen. That is an E36 I reel in over a lap, NASA ST5 class.
Not a big deal for an E92, but the fact that I haven't lightened the car at all, have all options, adjustable heated seats, Harmon Kardon 13 speaker stereo etc. and still faster than a gutted M3 from a few generations ago.
Streets is a tight technical track, the difference would be much greater at a fast track like Big Willow.