... produced from the 304, 316,321,310 and 310 stainless steel. High nickel Stainless steel auto muffler mat Gold standard type of front-end brands ... , usually produced from the 304, 316,321,310 and 310 stainless steel. High nickel content alloys, such as Inconel 601 * for high ... , especially when the converter unit located near the engine manifold. Stainless steel auto muffler mat