I assume you've done the same for brakes, installing a hi-temp fluid.
I’ve flushed the brake fluid twice with Wilwood fluid. Doing a complete change is hard since the brakes and clutch share one master cylinder and there is no way to bleed the clutch. It is self bleeding. I’m going to do another brake fluid flush soon. Brake fade was not an issue even slowing down fast from over 90 mph.
I used Redline synthetic in the transmission and OEM fluid with the friction modifier in the rear differential. Everything I’ve read on the posi rear diffs in those cars suggest AC Delco fluid as the go to. Tires are Firestone Firehawk Indy 500 V2s. They got very sticky once they were hot and weren’t bad cold.
I need to do a stick test from the windshield to the roll bar while wearing a helmet before I can schedule anything else. The Saturn is a 2007 so technically, it doesn’t need a roll bar for track day events but the car could be turned away depending on who’s running tech that day. They told me the bar would definitely pass tech as long as I had clearance above it. From what I’ve read, the Kappa cars have some issues passing tech at some tracks because the bar supports go forward and the angle isn’t very big. Sone tracks will allow the bar I have just based on who fabricated it. RPM has a great reputation for roll bars.