Increase horsepower and torque with a deeper, more aggressive exhaust note Welded from mild steel then bathed in a four-step chrome-plating process 4" muffler body uses a cooling chamber with proprietary technology to prevent blueing Feature scalloped chromed billet tips All necessary mounting hardware and instructions included, ensuring problem-free installation Made in the U.S.A.. MUFFLER SCLLPD STRYKER