A diagram of the exhaust system of a Honda Civic can be found online at HaynesOnline.com or in a Haynes service manual available for purchase in either online format or printed publication. Diagrams are also available at estore.Honda.com.
The detailed diagrams at estore.Honda.com contain official Honda manufactured products. In order to view a diagram of the exhaust system for a specific vehicle, choose make, model and year of vehicle. Then, choose electrical/exhaust/heater/fuel category. Next, choose exhaust pipe. A detailed diagram will be displayed with corresponding numbers that identify individual parts in the exhaust system. These parts are available for order.