RS-9 Enduro Full System Yoshimura Stainless Steel with Aluminum Sleeve and Carbon Fiber E The Yoshimura motto is simple and has not changed since the company's inception: Make the best products possible, and never compromise. The attention to detail and old- world craftsmanship that goes into making Yoshimura products is impossible to replicate with a machine. The technicians at work here are artists — the exhaust systems they produce are pieces of art. Signature series: Used by Yoshimura championship winning motocross racers. Tested, documented and marked as required by state and federal regulations to cover the entire powersports spectrum. Enduro Series: The evolution of Yoshimura's early offroad efforts. The Enduro Series are all equipped with USFS-approved spark arrestors, forest-friendly noise levels and are tailpipe emissions compliant. Race Series: The competitive edge, designed with nothing but power in mind. Developed in accordance with noise compliance regulations necessary for most race sanctioning bodies worldwide. For closed competition use only. RS-9 Dual: Honda CRF450R and CRF250R Exclusive Parallelogram-shaped muffler Maximized internal volume Straight, single-core baffle Tunable insert system RS-4: Pentagonal-shaped muffler Maximized internal volume Polyresonant duplex front chamber Stepped, two-stage core baffle USFS-approved 96dB spark arrestor available RS-3: Oval-shape muffler Maximized internal volume Straight, single-core baffle USFS-approved 96dB spark arrestor installed RS-3 Cone: KTM Exclusive Oval-shaped muffler Maximized internal volume Straight, single-core baffle Low-volume sound insert capable Spark arrestor installed except on carbon fiber mufflers RS-3D (RS-3 Dual): Honda CRF250R Exclusive (2006-2008) Oval-shaped muffler Aluminum sleeve with aluminum end-caps Maximized internal volume Straight, single-core baffle Spark arrestor installed Low-volume sound insert capable RS-2 and RS-2 Mini: Diamond-shape muffler Maximized internal volume Straight, single-core baffle USFS-approved 96dB spark arrestor installed TRC: Tri-Oval shape muffler Maximized internal volume Straight, single-core baffle USFS-approved 96dB spark arrestor installed TRS: Tri-Oval shape muffler Maximized internal volume Straight, single-core baffle USFS-approved 96dB spark arrestor installed