The Bilstein B6 24-283649 is a rear monotube gas-pressure shock for the Subaru Crosstrek. The manufacturer positions the B6 as a bolt-on upgrade that is tuned firmer than OE and is meant to work with the factory springs at original ride height, so you get tighter rear control without a lift or spring swap. The manufacturer also cites a working piston 63% larger than in standard designs, which it ties to sharper damping. Owners on user forums describe the rear as noticeably firmer than stock but not harsh, with better control under heavy loads, though some note faster rebound than the factory damping.
Fitment is the main point to verify. Listings disagree on coverage: some show 2018-2020 Base, Limited, Premium, and Hybrid trims, while others show 2018-2023 AWD or 4WD applications, so details vary and you should confirm the application with the manufacturer before ordering. Owners on user forums note that part numbers can differ between Crosstrek generations and trims. For DIY work, this is a rear bolt-on swap that needs jack stands, a torque wrench set to the manufacturer's values, and a check of the factory bump stops, which owners on forums have reported as worn on high-mileage cars. Searches for 2018 Crosstrek rear monotube shock, stock spring compatible rear damper, and Bilstein B6 rear upgrade Crosstrek AWD will lead to this part.
The manufacturer states the B6 is designed to improve control on your existing springs at the original ride height, so no lowering or lift is required.
Owners on user forums report the rear feels firmer than the factory setup but not harsh, with improved control when the vehicle is loaded.
Fitment details vary across listings, with some showing 2018-2020 and others 2018-2023 coverage, and some limiting it to AWD. Confirm your model year, trim, and drivetrain with the manufacturer before ordering.
This is a rear bolt-on replacement, so it suits a home mechanic with a floor jack, jack stands, and a torque wrench. Owners on user forums mention checking the factory bump stops during the swap, since worn stops are a common issue on higher-mileage Crosstrek rears. Confirm torque values with the manufacturer's instructions. Owners on forums who have upgraded other Crosstrek suspension parts often recommend a wheel alignment afterward to protect tire wear, and the manufacturer's install guidance for Bilstein struts on this platform also recommends a professional alignment after installation.
