304 Stainless Steel 3" Mandrel-Bent tubes. Includes the infamous Corsa Double Helix x-pipe mid-pipe (resonator delete). Includes the 4" Corsa polished quad tips. Comes with all necessary hardware for a simple installation. Fits 2018+ Ford Mustang GT vehicles without active exhaust. *May fit convertibles with removal of under-car bracing; however, this is not recommended.* Designed, engineered & manufactured in the USA.