The last two plaids I saw have black calipers. I wonder what that’s about.
Red also means upgraded pads too. It became standard on the Plaid earlier this year.
Tesla Adds Brake Pad, Red Caliper Kit Upgrades For Model S, Model X
The Red Caliper Kit for Plaid cars includes red calipers on the front brakes and red caliper covers on the rear brakes, plus higher thermal capacity brake pads.
insideevs.com