Finally joined @sub2club 🙌🙌🙌
Here is my PB 1:58.28 video (sorry for wind noise)
My new item, Apr gt250, does a great job that my M3 turns out an understeer car. Even though I have a gt4 style front lip and canards, I was fighting with understeer. Maybe I need to change my driving style. Also, Nankang CRS tires are very sticky tires. 
Still, there is a lot of rooms for new PB.

2011 E92 M3 6MT
Stock power and Stock weight 
Canards @stradale_design 
Front GT4 lip @pom_performance
Nankang CRS 295/30/18 @rcompoundusa 
Brembo GT @Brembo
APR GT250 62” wing
Coilovers w/ @swiftsprings 
Wheels @titan7wheels 
Exhaust @rpipower 
Seat @bride_japan 
Harness @schrothracing 
Bushings @splparts @powerflexbushes 
Alignment @chewerks