The Bilstein B8 5160 right rear shock (part 25-311419) is a monotube damper with an external remote reservoir, aimed at Toyota Land Cruiser 200 Series 4WD owners running factory height or a modest rear lift. Bilstein describes the B8 5160 remote reservoir shock absorbers as a direct fit solution for lifted trucks and SUVs, and says the reservoir adds cooling capacity and wheel travel compared with a traditional shock. That extra oil volume is what separates it from a stock unit on rough trails, where repeated hits build heat. Zinc plating and increased oil capacity are cited as factors in long-term durability. Owners on user forums describe Bilstein rears on the 200 as noticeably firmer than stock, so expect a stiffer ride rather than a soft one. Search terms: LC200 rear remote reservoir shock, B8 5160 right rear 4WD, 0-2 inch rear lift damper.
Fitment deserves a close look before you order. Listings describe this unit for the 2008 to 2021 Land Cruiser 200, but model-year coverage varies between sources, with some listing 2008 to 2011 and 2013 to 2021 Base trims plus 2020 to 2021 Heritage Edition. Confirm the exact year, trim, and drive type against your VIN with the manufacturer. Because this is one side of a pair, match it with the left rear shock and keep the reservoir mounting hardware in mind. Mounting the reservoir cleanly is what gives the assembly its low-profile look and keeps the hose routed away from the tire.
It is the right rear unit. In the US, the right side is the passenger side, so match the label to the side you are replacing. Buy one per side.
Owners on user forums report the job is quick once the truck is supported. One owner logged about 40 minutes on the left rear and about 10 minutes on the right, so the first side usually takes longer.
Owners on user forums say the upper nut is the tough step. A deep 22mm socket is needed to reach it, and holding the shock body with channel locks while turning the nut makes it easier to break loose.
This is a bolt-on rear swap that owners on user forums generally call manageable with a jack, jack stands, and penetrating oil on the old hardware. Expect to need a deep 22mm socket for the upper nut and a flex-head ratchet or breaker bar for the bottom bolt. Work from inside the wheel well if the upper nut is hard to reach, and hold the shock body so it does not spin while you loosen the nut. Support the truck securely on stands under the frame, and tighten all fasteners to the torque in the Toyota service manual rather than by feel.