Ford Mustang 2011-2013 Long Tube Stainless Steel Exhaust Header They have a minimum wall

They have a minimum wall thickness of

Speedmaster valve seals are posi-stop seals made from high-temperature Viton¨ material for a long-lasting seal

and include a mounting bracket

Unlike our competitors that only use 3 or 4 pinion gears

they're guaranteed for life

Ford Mustang 2011-2013 Long Tube Stainless Steel Exhaust Header They have a minimum wallIncrease 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.