What should be checked for in the exhaust system besides leaks?

When inspecting an exhaust system, it's essential to check for unsupported components because these parts are critical for maintaining the structural integrity and proper functioning of the system. Unsupported components can lead to increased vibration, potential damage to the exhaust system, and a dangerous scenario where parts may detach while driving. Ensuring that all elements of the exhaust system are adequately supported helps prevent deterioration over time and minimizes noise and exhaust leaks.

While the color of the exhaust can indicate engine problems or inefficiencies, and the sound of the engine can offer clues about its performance, these are not as immediately critical as ensuring that all parts are supported correctly. Fuel efficiency is overall a relevant aspect related to vehicle performance but does not pertain directly to the inspection of supporting structures within the exhaust system. Thus, focusing on the support of the exhaust components is a fundamental part of ensuring safety and compliance during inspections.