Not homologated. This is a stainless steel racing only slip-on muffler. The Track Series is designed and built by Dr. Jekill & Mr. Hyde and built for riders that want pure; powerful sound and uncompromised maximum performance. Perfect to compliment custom engine builds for those seeking power without legal limitations. No Smartbox intervention for regulatory control but still comes with three ''push of a button'' electronically valve-adjustable sound modes; from open (loud/racing) to closed (cruising). Built in the EU with European parts with the same high-end craftsmanship that is synonym with Dr. Jekill & Mr. Hyde. - Three electronically adjustable sound modes; from open to closed - No Smartbox intervention for regulatory control - Built for uncompromised power - Optimal exhaust flow and reduced back pressure - 4.5" diameter muffler with ''Track Series'' emblem - Throaty sound with reduced high frequencies - All end caps have four mounting holes; allowing them to be installed in four positions with 90-degree rotation - Premium European materials and a precision fit - Built in the EU - Chrome plated with a polished Slash Cut end cap - Designed to fit the OEM head pipes and OEM mounting brackets. Includes a blind-plug that closes the header when the left crossover pipe is removed from the header. For model years where required (21-up) it is possible to connect the O2 sensor to the blind-plug to prevent error messages