After taking some feedback from the last shakedown, Dundon brought back the GT4 RS with some changes. Man did it deliver...
* re: fastest Porsche GT lap, I believe the Dundon 991.2 GT3 RS ran a 1.40.x but unfortunately there is no recording of it. 

Tires: 265/305 SC3R
Ambient: 75F
Mods:
Dundon Street Headers: https://www.dundonmotorsports.com/products/718-gt4rs-street-header-package
Ti Muffler: https://www.dundonmotorsports.com/products/718-gt4rs-titanium-muffler
Dundon front splitter and dive planes (coming soon)
Dundon rear wing (coming soon)
MCS 3 way dampers.
380mm PFC brake kit.
19" Forgeline wheels