Stain -LESS
During my work with a leading stainless supplier in US, they alway reminded people that it was stainLESS steel, not stain free. Under the right temperature and humidity conditions, plus say road salt, a thin surface red rust can form in hours., particularly on the 4xx series (ferritic) grades. And not just in a lab😀
Most of time, ferritic meets the need, though the grade chosen by an OE varies depending where in the exhaust (hot end gets “better” grades) the component is located.
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71 Firebird Esprit
94 TA - 396 LT1 powered - Bought new in 1993. Total money pit
Cars gone by - 76 Formula, 73 Esprit, 75 Esprit. 87 Buick WE4
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