Coz didn't mention this to me, and I was very miffed about it when I found out. Why there are even two versions I'll never know... but the black is impregnated with graphite to help stop squeaking. I wanted to immediately see all the bushings I've done when ever I worked under the car, thought it would be kinda neat... so I went with red. Mine squeak constantly from the front tension rods I believe. I've not been able to pin point it though. It's semi embarrassing as it sounds like there is something wrong with my suspension, but there is not. All bushings are in place and look good, there is no damage to anything anywhere.