Introducing our billet birdcages for your sprint car. Made from 7075-t6 aluminum, these bad boys are built for strength and also look awesome. Keeping the integrity of the initial design, we also add a pocket in an effort to make them as light as possible. Features a one piece design, 32mm bearing included, yellow zinc snap ring. Hardware included, steel torsion arm flag bolt, titanium stop bolt, and titanium radius rod bolt.