This is a rear right Bilstein B8 5160 shock for the 1998-2007 Toyota Land Cruiser 100 Series and the matching Lexus LX470, built for vehicles without Active Height Control. It uses a 46mm monotube gas-pressure body with a remote reservoir, which the manufacturer says adds oil capacity and cooling and allows more wheel travel than a conventional shock. Its digressive valving responds to shaft speed, and the body carries a zinc finish. Compared with a stock damper, the larger oil volume helps the unit resist heat-related fade on rough trails and loaded trips. Cheaper generic shocks rarely match that construction, and owners on user forums describe a more controlled, less wobbly highway ride after upgrading the front shocks alongside the rears.
This is a bolt-in replacement for owners running a mild lift of roughly 0 to 2 inches, typically paired with Bilstein or other rear springs. The upper stem and lower eyelet mount into the factory locations, and the manufacturer's design uses a swivel banjo fitting on the reservoir hose for a low-profile routing. Search terms for this part include 98-07 Land Cruiser 100 rear shock, 5160 remote reservoir LX470 rear, non-AHC 100 Series lift shock, and Bilstein B8 5160 rear right. For a matched set, pair it with the rear left counterpart so both sides ride identically.
Owners on user forums report pairing the Bilstein 5160 rear shocks with Bilstein rear springs for about 2 inches of rear lift, and one owner found that a heavier spring made the rear feel firmer and bumps rougher. Spring choice changes both ride height and ride quality, so confirm the setup with your lift supplier.
Owners on user forums describe the rear top mount nut as awkward to reach and torque, and one warned against overtightening so the stem does not strip. Use a thread-friendly technique and check the torque spec with the manufacturer.
Swapping the rear shock is a bolt-in job rather than a cut-and-fit modification, but owners on user forums point to a few gotchas. Support the rear axle with a jack before removing the lower mount so the spring stays under control, and keep the reservoir hose routed away from the exhaust and suspension travel. The upper stem nut is the most fiddly step, so tighten it carefully instead of forcing it. If you are also changing rear springs, plan for extra time: forum builders have described using a scissor jack between the axle and frame to make room for the new spring. Confirm torque specs and the correct lift range with the manufacturer before installation.
