2" Stainless Headers. 2020 Mustang GT500 5.2L. 2020-2023 Ford Mustang GT500 5.2L 2" x 3" Stainless Steel Headers. 304 Stainless Steel Construction Requires Kooks Connection Pipes Includes O2 extensions, Gaskets, and Installation Hardware MSRP: Was: Now: $1,413.50