Pair of Rear Upper Arms for Scion FRS, Subaru BRX, Toyota GT86 and GR86. We now include the OEM style RUCA ball joint pin for the bearing outer joint which alows you the convenience of installing this RUCA with the OEM knuckle however this arm will only give you unlimited suspension travel for a super low ride height when paired with our rear knuckle. The 2 included options for the outer joint, means you are free to choose weather your basic needs for controlling camber is fine with OEM knuckles or you may choose to add drop knuckles to your more extreme build now or anytime you see binding caused by your settings. To use MAX rear drop knuckles, simply remove the black pin from the bearing, & slip in the gold side spacers and connect to the fork on our knuckles after rotating the RUCA outer joint 90°. The unique shape of our RUCA casting is built for frame rail and axle clearance. With this arm by itself, you can add a little more negative camber or take out a lot for superior drifting traction & tire wear (-10mm to +50mm length Upper arms). With our RLCA sold separately you can add tons of camber and balance the camber setting between upper and lower arms to keep the same axle length. Ultimately if you add subframe risers &/or the 30mm roll center corrected drop knuckle (sold separately) that would restore handling geometry lost on lowered cars & this opens caliper options like our front knuckles: Either OEM foot-brake and Z32 hand-brake OR dual Z32 reproduction calipers we sell for $215/pair loaded.