Caitlyn Jenner is NOT slowing down in her sixties -- in fact, she can now hit 60 mph in under 4 seconds flat in the sick new Porsche she just bought.
Caitlyn picked up her Porsche 911 GT3 RS in Woodland Hills, CA on Monday, and it must have been a real quick ride home. The whip goes zero to 60 in 3.1 seconds!
We're told she ordered the ride -- which retails for about $176k -- months ago. It's street legal, but make no mistake, it's built for the track ... and 66-year-old Caitlyn does love racing. She recently nabbed a 3rd place finish.
As for the purple? Not an homage to Prince -- we're told she'd ordered it long before his death.