These lower pulleys are compatible with ATI part numbers 918854 and 918856 for the LSA and LT4 (Camaro/CTS-V only) damper. They are machined from 6061 aluminum and anodized for protection. The pulleys are available in these standard sizes, as well as custom sizes: 230mm (9.06″) [LSA 15%] 235mm (9.25″) [LSA 18%] 240mm (9.45″) [LSA 20%] 245mm (9.65″) [LSA 23%] 250mm (9.84″) [LSA 25%]
