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Yoshimura

Yoshimura RS-12 Hybrid Exhaust System Yamaha YZ450F 2026

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Motorcycle Muffler Repacking Explained and Made Simple by Yoshimura R&D

Stainless Steel/Titanium/Aluminum/Carbon Fiber

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Material: Stainless Steel/Titanium/Aluminum/Carbon Fiber

Blemished/Refurbished

This item is available as a Blem/Refurb. These are items that cannot be sold as "New" merchandise and are limited to stock on hand. See the product details for a description of the product's condition.

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Yoshimura RS-12 Hybrid Exhaust System Yamaha YZ450F

The Yoshimura RS-12 Hybrid Exhaust System stands out as a perfect blend of durability, weight reduction and cost-effective performance for the Yamaha YZ450F. Engineered with a robust stainless steel header and a lightweight combination of titanium and aluminum in its muffler, it effectively cuts down on weight while significantly enhancing power output. The performance improvements include a notable 9.3% increase in horsepower and a 9.6% torque boost at 6,200 RPM. The design incorporates advanced header and muffler resonators to optimize power delivery. Additionally, a precision machined joint facilitates easier installation, making it simpler than removing the stock exhaust.

Features:

Strategic hybrid construction features a durable stainless steel header and a lightweight titanium/aluminum RS-12 muffler
Delivers massive performance gains: +9.3% HP and +9.6% torque at 6,200 RPM
Volume-specific header resonator and internal muffler front-cap resonator work together to optimize power delivery
Significantly lighter than the stock exhaust system
AMA and FIM 109dB sound regulation capable (with the optional INS-39-K insert)
Precision machined joint ensures a quick, hassle-free installation
Proudly engineered, developed, and built in Chino, California

Weight:

Stock system: 9.4 lbs
SS/AL/TI/CF RS-12 full system: 9.3 lbs

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This product is vehicle specific. Click here to select your vehicle to ensure fitment.

Yamaha: YZ450F 2026

This item is also available for 63 other models:

Gas Gas: MC 250F 2021-2023; MC 250F 2024-2026; MC 250F Factory Edition 2023-2025; MC 350F 2022-2023; MC 350F 2024-2025

Honda: CRF250R 2022-2024; CRF250R 2025-2026; CRF250RX 2022-2024; CRF250RX 2025-2026; CRF300L 2021-2025; CRF300L ABS 2021-2024; CRF300L Rally 2021-2025; CRF300L Rally ABS 2021-2024; CRF450R 2025-2026; CRF450R 2021-2024; CRF450R 50th Anniversary Edition 2023; CRF450R-S 2023-2024; CRF450R Works Edition 2026; CRF450R Works Edition 2021-2024; CRF450RX 2025-2026; CRF450RX 2021-2024

Husqvarna: FC250 2019-2022; FC250 2023-2025; FC250 Rockstar Edition 2022-2025; FC350 2019-2022; FC350 2023-2025

KTM: 250 SX-F 2019-2022; 250 SX-F 2023-2026; 250 SX-F Adamo Edition 2025; 250 SX-F Factory Edition 2021; 250 SX-F Factory Edition 2022-2025; 250 XC-F 2019-2022; 350 SX-F 2019-2022; 350 SX-F 2023-2026; 350 XC-F 2019-2022; 350 XC-F 2023-2025; 350 XC-F Kailub Russell 2021

Kawasaki: KX250 2025-2026; KX250 2021-2024; KX250X 2021-2024; KX450 2024-2026; KX450 2019-2023; KX450SR 2026; KX450SR 2022-2023; KX450X 2024-2026; KX450X 2021-2023

Suzuki: RMZ450 2018-2026

Triumph: TF250X 2024-2025; TF450C 2026; TF450E 2025-2026; TF450RC Edition 2025; TF450X 2026

Yamaha: WR250F 2020-2023; YZ250F 2024-2026; YZ250F 2019-2023; YZ250F 70th Anniversary Edition 2026; YZ250F Monster Energy Race Edition 2024-2025; YZ250F Monster Energy Race Edition 2021-2023; YZ250FX 2020-2023; YZ450F 2020-2022; YZ450F 2023-2025; YZ450F Monster Energy Race Edition 2021-2022; YZ450F Monster Energy Race Edition 2023-2025

Product Style	Item #	Store SKU	Manufacturer Product #	Availability
Product Style Stainless Steel/Titanium/Aluminum/Carbon Fiber	Item # 10591429	Store SKU	Manufacturer Product # 234850S720	Availability Out of Stock

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