Is your Peterbilt or Kenworth cab bouncing too much on rough roads? These cab shock absorbers help smooth out the ride by dampening vibrations between the cab and chassis. This 2-pack is a direct replacement for part numbers 12018002 and 25523013. They fit a wide range of Peterbilt models (like the 386, 567, 579 from mid-2000s to 2020) and Kenworth models (T660, T680, T880). Worn cab shocks can make driving uncomfortable and increase wear on other parts. Installation is straightforward if you're familiar with truck maintenance. Always double-check your exact truck model and year using the Amazon fitment tool, but if your ride is getting rough, these shocks will help tighten things up.