The C446BR (also referred to as Sirco C446BR, Euclid E‑2446B/E‑5511, Automann 122.282402.04, Meritor 2210‑D‑6868, Dayton 04‑932421, World American WA05‑5020, Spicer 17‑724, Leland L‑3116) is a right-hand “Q‑Plus” S‑camshaft engineered for 16½″ Meritor Q‑Plus trailer brake systems. Constructed from forged steel with CNC-machined splines and an induction-hardened cam head, this camshaft is built for durability and precise brake actuation in demanding fleet applications.