The CAO Flathead is inspired by the classic American flathead V8 engine, with vitola names drawn from automotive terminology — Spark Plug, Camshaft, Piston, Carb, Big Block, and Resonator. The line has expanded across multiple engine-themed sub-expressions: the original featuring a Connecticut Broadleaf wrapper; the V19 with a Connecticut Broadleaf and American Havana binder; the V21 with a Mexican San Andrés wrapper; the V23 with a Honduran Jamastran wrapper; and the Speed Shop with an Ecuadorian Habano wrapper. Each expression maintains the automotive vitola naming while delivering a distinct flavor profile through its wrapper variation.