Replace 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. Need to adjust camber? Check out our adjustable rear upper camber arm, PN 72370. For more toe adjustment than the OE cam provides, consider adjustable link, PN 72380. California Residents WARNING