so it doesn't run when warm. Bushings are personal preference, some like OEM that slightly dampens and some like the direct gate like shifts. The only dislike for me with any of the solid bushings is adjusting them for stiffness of the shifter movements. I have been playing around with a new design of bushings for a few years now and been happy with it, in my short shifters. No need for adjusting, just tighten and way you go. Consists of bronze bushings and needle roller bearings. I can email some details if you'd like.