Ford Mustang 2011-2013 Long Tube Black Steel Exhaust Header The Speedmaster blocks are cast

The Speedmaster blocks are cast from high-density iron with extra-thick cylinder walls and decks

1966-83 trucks and Suburbans

Designed for precision fitment and easy installation

or street performance

Ford Mustang 2011-2013 Long Tube Black Steel Exhaust Header The Speedmaster blocks are castIncrease your horsepower and torque for your ride just bolt on these Speedmaster headers! These headers are designed with 3 8 in. thick laser cut flanges and mandrel bent primary tube. If your vehicle is using aftermarket components, parts from other applications, or custom altered parts, then it is the installer's responsibility to verify fitment.