The Hendrickson HTB shock absorber, part number 066153-005L (also referenced as 661535L), is a genuine Hendrickson suspension component designed for heavy-duty truck applications. Hendrickson HTB suspension systems are used across a wide range of commercial truck and trailer configurations, and this shock is a direct replacement part for that platform. If you are sourcing this part and need to verify fitment for your specific axle or suspension configuration, contact Pro Gear and Transmission directly. Not sure this is the right part? Give us a call before ordering.FeaturesGenuine Hendrickson HTB suspension shock absorberPart number 066153-005L, also referenced as 661535LDesigned as a direct replacement for HTB suspension systemsCall Pro Gear and Transmission to confirm compatibility with your specific application