Does anyone know what type of stainless the stock GT exhaust is made of?

T304 or T409 ?

 

I'm pretty sure it's T409 because my exhaust pipes on my 14 GT have rust spots all over them and they were that way when I bought the car off the dealer's lot. I think the factory mufflers are the same and I know the GT500 AB is T409 because I have read the description on many selling websites. I'm pretty sure both mufflers are made from the same material.


Wayne

 

409 and they don't really "rust", just discolor.

 

Thanks guys! Now I need to find a good exhaust shop in Charlotte