Whiteline Heavy-Duty Adjustable Rear Lower Control Arms WRX 12-26 | KTA139A

Whiteline KTA139A replaces both factory rear lower control arms with heavy-duty adjustable assemblies. Its turnbuckle design allows on-car rear camber adjustment up to approximately ±3.5 degrees, providing more range than the stamped-steel KTA216A for lowered or motorsport-oriented setups. Whiteline’s vehicle selector lists KTA139A for WRX applications through 2026, including Premium, Limited, and GT configurations, and the kit contains two arms. This is a distinct product configuration rather than a duplicate of KTA216A. No engine calibration is required. Installation changes structural suspension links and should be completed with correct ride-height torque, clearance checks, a professional four-wheel alignment, and a post-install fastener inspection.