The Bilstein 35-300083 is a front right replacement strut assembly from the B8 Performance Plus line, built as a monotube damper for the right-hand front corner of a Subaru WRX or WRX STI. It is a direct-fit unit for the factory strut position, so you change the damping at that corner without moving to a coilover setup. Compared with a cheaper unbranded strut, this one carries a known Bilstein damper design that you can match to the other corners of the car. Shoppers often search for terms like "2015-2017 WRX front right strut," "WRX STI monotube strut 35-300083," and "Bilstein B8 front strut replacement."
Replacing a front strut on this platform is a jack-stand job. The brake line and ABS wire must be detached from the strut first, the lower clevis fasteners removed, and the upper top-mount nuts taken off before the assembly comes out. Fitment details differ across sources, with some listings showing 2015-2017 and others showing 2015-2021 for this part number, so confirm your model year and trim with the manufacturer before ordering. Check whether your existing spring must be moved over, since that determines whether you need a spring compressor.
This is an intermediate job that needs a vehicle on jack stands with the wheel removed. Expect to disconnect the brake line and ABS wire from the strut, remove the two lower clevis bolts and the three upper top-mount nuts, then lift the assembly out. Jack up vehicle, place on jack stands, and remove wheels. Remove brake line and ABS wire from front strut. Remove two lower 19mm clevis nuts/bolts. Remove three upper 12mm nuts that fasten strut top mounts to chassis. Common tools include a 19mm socket, a 12mm socket, a 17mm socket, and a torque wrench, plus penetrating oil for seized fasteners. Confirm torque values with the manufacturer's documentation for this exact part before final tightening, since the values in third-party kit guides are not specific to this SKU.
