Final answer:
Muffler shrouds in exhaust systems are typically made from stainless steel for its durability and heat resistance, although aluminum or aluminized steel can also be used.
Step-by-step explanation:
Muffler shrouds, also known as heat shields, in the exhaust system of vehicles are commonly made from materials that can withstand high temperatures and prevent heat from affecting other components. The most typical material used is stainless steel, which is chosen for its durability, resistance to corrosion and rust, and its ability to handle the high temperatures produced by the exhaust system. Another material sometimes used for muffler shrouds includes aluminum or aluminized steel, which offers a good balance between heat resistance and weight efficiency. These materials ensure the longevity of the muffler shroud and help maintain the efficiency and safety of the vehicle's exhaust system.