A-arm, lower control arm, it's the part that the ball joint is pressed through and the spring sits in. I got a Moog replacement one from Summit racing for something like $85 earlier this year..
I had a nightmare Saturday night that we were cruising, and someone blew a stop sign and slammed into @blwn93gt and @redlawyers.. which caused me to run into @redlawyers... I woke up in a cold sweat lol