Yoshimura Honda CRF450R 2025 RS-12 Stainless Full Exhaust System

Yoshimura RS-12 Stainless Full Exhaust System

The 2025 Honda CRF450R is here and has undergone significant changes to the overall package. Hunter Lawrence found the changes so inspiring that led him to compete with the new machine in the last three rounds of AMA Pro Motocross.

The newest CRF450R boasts an all-new new chassis, airbox and ECU configuration. Our engineering and development team has had their nose to the grindstone with Team Honda HRC to squeeze every drop of performance out of the new 450. With our new RS-12 Signature Series full system, Yoshimura achieved a max HP gain of 3.7% over stock while the max torque gain came in at 1.3%.

CRF450R RS-12 is designed, developed and made in the USA with the help of Team Honda HRC race team in the USA and in Europe.

FEATURES

All-New Chassis, Airbox & ECU Configuration

• Optimized for maximum performance in collaboration with Team Honda HRC.

RS-12 Signature Series Full System Performance Gains

• Max HP Gain: 3.7% over stock.
• Max Torque Gain: 1.3% over stock.

Hydroformed Muffler

• Weight-reducing hydroformed technology.
• Stronger and lighter construction.
• One-piece resonator for improved durability.

Hydroformed Header Primary

• Precisely matches the oval exhaust port for smoother transitions.
• Fewer welded connections for increased durability.
• Enhanced fit due to hydroform process accuracy.

Carbon Faced Machined Joint

• Eliminates the need for anti-seize.
• Carbon atom impregnation reduces wear and friction.

Header Resonator

• Developed with Honda HRC for optimal power distribution.
• Enhances rider connectivity.

Cast Manifold

• Improved strength and durability.
• Easier installation and removal.

INS-32-K Sound Insert (Pre-Installed)

• Produces an appealing exhaust note.
• Optimized for best power output.

Please note: This product was designed to fit on a standard equipped motorcycle, as delivered from the factory. OE and aftermarket accessories not found on a bike as delivered from the factory may not be compatible with this product. 

This product was designed and tested to be compatible with vehicles in the U.S. marketplace only. Compatibility, including fitment and performance, may vary by marketplace.

Browse more

• Browse all Yoshimura
• Browse all Yoshimura RS-12 Exhaust Systems
• Browse all Exhaust Systems