Stout Mufflers - Black3548582Caracteristicas: Massive 4" non tunable bodies Streamlined, internal tapered, billet aluminum end caps with recessed fasteners are preinstalled Inlets shaped for better flow into OEM headpipe as well as SuperTrapp True Dual Headpipes Provide a bold, strong power curve from mid range on up with a significant horsepower and torque gain over stock mufflers Classic deep and heavy Kerker rumble is 5 dB over stock Made in the U. S. A. Peso: 20. 3 Alto: 11.