* Low melting point: Exhaust gases reach extremely high temperatures. Copper's relatively low melting point means it would quickly soften and potentially melt, leading to catastrophic failure and potentially dangerous consequences.
* Corrosion: Exhaust gases contain corrosive components that would rapidly attack and weaken copper piping. This would lead to leaks and premature failure.
* Toxicity: Although less of a direct issue than the other points, copper could potentially react with some exhaust components, creating toxic compounds.
Exhaust systems require materials that can withstand extreme heat, corrosion, and pressure. Steel, stainless steel, and sometimes aluminum alloys are used for this purpose.
