The decision at hand is replacing the high grade muffler system with one made with low grade cheaper materials. The problem is condensation of any water within the muffler will likely result in an acidic mixture which will end up making holes in the component if it is made of low grade material. Determine if this can be allowed. engine consumes 120 % theoreticl air mixture with gasoline (C8H18) which rises up to 2000k right after combustion but exits engine at 300 C . Muffler system is at 1 atm but temperature can drop to 40 C on a cold day.