The Bilstein B4 OE Replacement suspension strut assembly (part number 22-246578) is a complete twin-tube damper unit for owners who want a Land Rover LR2 riding closer to factory spec. It has a stem-style upper mount and a base-cup lower mount, and it comes in black paint, so it is meant to take the place of a worn factory strut rather than require custom brackets. Owners on user forums who fitted Bilstein B4 shocks to an LR2 describe a ride that kept stock height and felt a bit firmer and more controlled than worn OEM units. That is the main reason to pay more than a budget strut.
Verify fitment before you order. The product name cites 2015-2018 LR2 models, but other fitment data lists 2008-2015 vehicles in the rear right position, so check the part against your VIN and the manufacturer's application data. Replacing struts on both sides of the same axle keeps ride and handling balanced. Shoppers searching for this part often use terms like Bilstein B4 LR2 rear strut, 22-246578 Land Rover LR2 rear right, LR2 twin-tube strut replacement, and LR2 OE-style ride upgrade.
Fitment data varies. The product name lists 2015-2018 LR2 models, while other fitment data lists 2008-2015 vehicles in the rear right position. Confirm the application against your VIN and the manufacturer's application data before ordering.
Owners on user forums who fitted Bilstein B4 shocks to an LR2 report that the vehicle kept stock height and felt slightly firmer than the original shocks. Results will depend on the condition of the rest of the suspension.
Expect a moderate DIY job. You will need a floor jack, jack stands, a socket and wrench set, and penetrating oil for seized fasteners. Owners on user forums who fitted Bilstein shocks to other Land Rover models report that the units are stiff to compress, so a helper or a bottle jack to support the assembly makes the job easier. One forum answer also notes that the top mount washers have a domed side that faces inward, so check the orientation before tightening. Confirm whether a coil spring comes with this assembly before you start, since that changes the tool list.