Upgrade your motorcycle's performance with the YOSHIMURA RS-4 Slip-On Exhaust System (Part Number 16190BD520). Designed through collaboration with factory race teams, this exhaust system enhances performance while effectively reducing sound levels and centralizing mass for optimal balance. Experience the competitive edge that comes from a meticulously crafted exhaust system that prioritizes both power and sound quality. Features: * Muffler Shape: Pentagonal-shaped muffler for improved aesthetics and performance * Internal Volume: Maximized internal volume for enhanced exhaust flow * Front Chamber: Polyresonant duplex front chamber to optimize sound * Core Baffle: Stepped, two-stage core baffle designed for superior sound modulation * Compatibility: Spark Arrestor/Sound Insert compatible for versatile use