High grade 304 stainless steel Hand TIG welded with spring clip joints Stepped 5-inch diameter muffler CNC machined billet end cap Laser engraved riveted logo badge Mid pipe heat shield for boot protection Meets SAE J2825 sound standard Designed specifically for the BMW GS Boxer motor. Compatible with BMW factory panniers and center stand. 50-State emissions compliant Made in the U.S.A.. MUFFLER HO R1200GS 13-18