Tubular control arms reduce unsprung weight while improving weight distribution in race applications. QA1 Mustang tubular control arms require the use of QA1 coil-over struts. QA1 caster camber plates are recommended. Get a substantial weight savings of 15 lbs. per set! Eco-Comp Control Arms are built with poly bushings and engineered for performance. For use on the strip, the Eco-Comps offer value without sacrificing performance. Each kit comes with 1 left control arm and 1 right control arm.