Yoshimura 244730S320 RS-12 Full Exhaust – 2024 Kawasaki KX450 / KX450X

✨Yoshimura 244730S320 RS-12 Full Exhaust – 2024 Kawasaki KX450 / KX450X

Unleash proven race-winning performance with the Yoshimura RS-12 Full Exhaust System for the 2024 Kawasaki KX450 and KX450X, built for riders who demand more than “good enough.” Yoshimura engineers went back to the drawing board after feedback from the Factory Kawasaki Red Bear off-road team showed there was still hidden power in the KX450 platform. The RS-12 stainless and aluminum system with carbon fiber end cap was refined through real-world GNCC competition—where the results were undeniable.

The new spec RS-12 exhaust system for 2024 KX450 and KX450X helped Stew Baylor pull his first GNCC holeshot in years, showcasing the added efficiency and improved power curve. Producing up to 4.4% more horsepower at 8,600 RPM and up to 4.8% more torque at 8,400 RPM, this RS-12 exhaust system creates stronger acceleration, enhanced traction, and a cleaner drive off the start. Combined with the PTF insert system, asymmetrical muffler shape, precision-machined joints, and industry-leading carbon fiber end cap, the RS-12 is built for peak performance and serviceability. Proudly designed, developed, and manufactured in Chino, California.

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Vehicle Fitment

Kawasaki KX450 — 2024-2026
Kawasaki KX450X — 2024-2026

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Top Features

• Rubber-mounted RS-12 muffler reduces vibration to subframe for improved durability.
• Asymmetrical RS-12 profile maximizes internal volume and incorporates resonance chamber for enhanced power and sound control.
• Up to +4.4% HP and +4.8% torque with refined power delivery.
• Precision-machined joints ensure perfect 360° sealing and longer system life.
• PTF insert system allows quick sound-insert or spark-arrestor changes.
• Works-look matte carbon fiber end cap with race-inspired detailing.
• Optional spark arrestor (SA-21-K) available separately.

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FAQ - Questions

Q: Does this RS-12 system require ECU tuning?
A: The system is designed to perform exceptionally well as installed, but ECU mapping can further optimize throttle response and power.

Q: Is this exhaust legal for off-road competition?
A: Yes. With the optional spark arrestor installed, it is compliant for most off-road events and trail systems.

Q: What improvements will I feel compared to stock?
A: Increased horsepower and torque, crisper throttle response, and stronger pull in mid-range and top-end—especially noticeable off the start.

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🚀 Dominate the track or trail with the Yoshimura RS-12—race-developed, championship-proven performance for your 2024-2026 Kawasaki KX450 or KX450X. Order now and feel the power difference.

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