At DMG Motorsports, we present the Yoshimura RS-4 Full System Exhaust SS-AL-CF (224500D320) — the same race-proven RS-4 platform that has powered championship-winning off-road machines, now built for your Honda CRF450X/CRF450L/RL. This Enduro Series system pairs a durable stainless steel tapered header and mid-pipe with a lightweight aluminum muffler sleeve and a carbon fiber end cap, delivering the perfect balance of strength, weight savings, and aggressive styling. This is Yoshimura's premium dirt bike exhaust designed for the racer that wants to squeeze every last bit of power out of their machine. The system starts right at your engine with a tapered header pipe that optimizes exhaust flow for both efficiency and power output. Exhaust gasses then travel back through the pentagonal muffler, where the polyresonant chamber tones the exhaust note down and pumps up power when you hit the mid and high ranges.

Built as part of Yoshimura's Enduro Series, this system is an evolution of Yoshimura's early off-road efforts crafting off-road exhaust systems, and is equipped with a USFS-approved spark arrestor with forest-friendly noise levels while remaining tailpipe emissions compliant. Yoshimura's engineers tailored the power delivery of this system to give the machine more usable rideability, resulting in power up and weight down for a win-win situation for your off-road machine. Whether you're tackling the trails or lining up at the start, this RS-4 system is engineered to help you ride harder and faster. If you're serious, it's only Yoshimura — proudly made in the USA.

Features:

• Pentagonal-shaped muffler for maximized internal volume
• Polyresonant duplex front chamber tones down exhaust note while boosting mid and high-range power
• Stepped, two-stage core baffle for optimized flow and sound control
• Durable high-grade stainless steel tapered header and mid-pipe
• Lightweight aluminum muffler sleeve with carbon fiber end cap
• Spark Arrestor/Sound Insert compatible, with USFS-approved spark arrestor included
• Considerable weight reduction over stock exhaust
• Tailpipe emissions compliant for Enduro Series off-road use
• Proudly made in the USA
• Fits 2019-2025 Honda CRF450L/RL and CRF450X models

Fitment