The YOSHIMURA RS-4 Slip-on Exhaust features a distinctive pentagonal-shaped muffler designed to maximize internal volume for optimized performance. At its core, the system utilizes a polyresonant duplex front chamber paired with a stepped, two-stage core baffle, engineering a precise acoustic and flow profile within the exhaust path.
This configuration supports versatile installation options, as the unit is compatible with both spark arrestors and sound inserts. These adaptable components allow riders to tailor the exhaust’s compliance and acoustic characteristics to specific regulatory or personal preferences while maintaining the structural integrity of the RS-4 design.