A dual-outlet header is recommended for 6-cylinder engines, especially if no other modifications will be made. This game-changing dual-outlet header sports a gorgeous nickel-plated finish. The primary tubes on this dual-outlet header have a diameter of 1-1/2,, the collectors measure 2-1/2 in diameter with a 5/16 thick mounting flange. The dual-outlet header kit is for Mustang enthusiasts that have a 6-cylinder engine but want that classic look and the beefy, impressive sound of a V8. The installation of this Scott Drake dual-outlet header kit for your Mustang will improve both your horsepower production and the fuel economy. Gaskets and mounting hardware are included.