Designed to supplement the Auto Upkeep curriculum, this Google Assistant application helps you review the content learned in Chapter 17 - Exhaust and Emission System. Auto Upkeep is an introductory automotive curriculum that provides the fundamental knowledge and experience in owning and maintaining an automobile. Now in its 4th Edition, Auto Upkeep has been trusted for over 15 years by hundreds of automotive programs in North America to give students a solid automotive foundation. To learn more about the Auto Upkeep curriculum, go to AutoUpkeep.com. All content is © Rolling Hills Publishing/Auto Upkeep.