I hate to disagree with my boy Theo…
BUT…
(I know this since I sell Energy) The black ones are infused with graphite and they do not squeak. The red ones go squeak squeak squeak as you drive down the road/track.
We barely stock the red ones at PI, we special order them for showcar tools who like the redness and never drive their cars.
The part numbers have R and G at the end, the G stands for Graphite.
and yeah, best thing you can do to your car is install the hyperflex kit. DOOO IT