This report presents estimates of the retail price equivalent (RPE) or 'sticker price' for a variety of automotive exhaust emission control related components/systems. The author began with a three-level assumption as to industry makeup (supplier, vehicle assembly, dealer) and used this standard approach along with assumptions as to production volume and the amounts of labor, overhead, tooling, administrative, and depreciation expenses and profit at the supplier level, tooling, research and development, and administrative expenses and profit at the vehicle assembly level, and labor, overhead, and profit at the dealer level to determine the RPE. Where little physical description of a component could be found, a 'best guess' effort was made. A methodology description is also included. It should be noted that since a specific production volume was assumed in each case, the RPE estimates are valid only within some relevant range of production volumes.