SPC Rear Lower Arm 2015-2023 Ford MustangReplace your worn or damaged rear lower control arm on the S550 Ford Mustangs with this forged T6 aluminum replacement arm from SPC. Arm includes SPC's xAxis sealed flex joint and replacement hardware for the outboard end. This OE replacement arm offers significant weight reduction over the OE arm. Need to adjust the camber? Check out our adjustable rear upper camber arm, PN 72370. For more toe adjustment than the OE cam provides