Surprised back to back Sonoma weekends in June and was happy to set a PB that's almost 1 second faster after stiffen up the damper for both low speed compression and rebound. It was back to back PB laps with some small mistake at T7, T10, T11 that I need to clean up. Maybe the car does have a 1:40.x in it after all?

Mods:
Brembo BM6 380mm BBK - front & rear Endless ME20
KW V5 Coilovers with Z07 spring rates
Forgeline 19x9.5 & APEX 19x12 
Nankang CR-S V2 265/35ZR19 & 325/30ZR20 (4nd day)
Magnaflow X-Mod Cat Back Exhaust
Verus Engineering front splitter
APR Performance GTC-500 wing
GM track spec alignment & TC off