At DMG Motorsports, we present the Yoshimura RS-4 Race Series Full Exhaust System (123400D520) — a stainless steel header and canister paired with a carbon fiber end cap, purpose-built for the Honda CRF250L and CRF250L Rally (2017-2020). Born from Yoshimura's championship-winning off-road R&D, this system is engineered to unlock more usable power throughout the rev range while keeping the exhaust note refined and race-legal. The pentagonal muffler design and internal engineering deliver a genuine performance upgrade over the stock unit, all while trimming meaningful weight from the bike for sharper handling.

By reworking the internal chamber and baffle design, the RS-4 gives your CRF250L or CRF250L Rally noticeably stronger bottom-end punch without giving up mid-range or top-end power, and it does so while shedding a significant amount of weight compared to the factory exhaust. The stainless steel tapered header and canister are finished with a distinctive carbon fiber cone end cap, giving the bike a race-ready look to match its race-ready performance.

Features:

• Pentagonal-shaped muffler for a distinctive, race-inspired profile
• Maximized internal volume for improved exhaust flow and power delivery
• Polyresonant duplex front chamber that tones down noise while boosting mid-to-top end power
• Stepped, two-stage core baffle for refined sound and performance balance
• Spark Arrestor/Sound Insert compatible for trail and race compliance
• Durable stainless steel tapered header and mid-pipe construction
• Carbon fiber cone end cap for reduced weight and aggressive styling
• Considerable overall weight reduction versus the stock exhaust system
• Proudly made in the USA by Yoshimura
• Fits Honda CRF250L and CRF250L Rally, 2017-2020

Fitment