ISR Performance Rear Lower Control Arms for 2013-2016 Scion FR-S RWD (ZN6) C43 AMG 4 Spring Rate - Front

4 Spring Rate - Front 5 kg/mm (280 lbs/in) Spring Rate - Rear 4 kg/mm (224 lbs/in) Vehicle Fitment

Damping Adjustable No Extended Length 14

A wider piston shaft than conventional uprights means more consistent damping on long sessions and more fatigue life before rebuild

2020 Audi A4 40 TFSI Premium Plus AWD (B9)

ISR Performance Rear Lower Control Arms for 2013-2016 Scion FR-S RWD (ZN6) C43 AMG 4 Spring Rate - FrontISR Performance Rear Lower Control Arms for the 2013 2016 Scion FR S (ZN6) are built to restore proper suspension geometry, dial in alignment that slammed stock arms can't reach, and add years of service life. If you've lowered the FR S on coilovers or dropped springs, factory hardware in this location can no longer keep the alignment honest these parts solve that problem and sharpen how the chassis feels under load. Every ISR rear lower control arms