Are factory exhausts for 97 4.6 stainless of aluminized steel? I have to weld in new cats, just wondering what material I'm dealing with.
My magnaflow muffler is covered in surface rust, which is 409 stainless steel, so...
Don't forget, he lives where they salt the roads every winter.someone got ripped off :tongue:
Type 304 is not a low grade stainless; type 409 is the lower grade and most likely the grade of stainless used for the exhaust from the factory. See below for why.As it's already been said the factory exhaust is stainless..A low grade stainless probably a 304 type stainless, but stainless nonetheless..
There's no reason to downgrade in quality if the factory used stainless..
It all depends on the type of stainless; there are about 30 different types ranging from 100 series to 600 series ...So the SS on boats is going to corrode.