Yoshimura CRF450R/RX 2025 RS-12 Titanium Full Exhaust, w/ Titanium Muffler

The 2025 Honda CRF450R has been unveiled, and has already won the 2024 SMX Championship under Jett Lawrence and taken second place in SMX under Jett's brother Hunter! When it comes to Honda Motocross Racing exhaust systems nobody even comes close to Yoshimura R&D of America.

The newest CRF450R boasts a 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 titanium full system, we achieved a max HP gain of 3.7% over stock while the max torque gain came in at 1.3%.

HYDROFORMED MUFFLER

This is the first of a new generation RS-12 profile exhaust system featuring weight reducing hydroformed technology. This technology allows to maximize available space for a tailored fit while minimizing material usage. Hydroforming removes many of the limitations of conventional metal forming methods allowing for a stronger and lighter muffler. This new sleeve also incorporates a deep draw one-piece resonator further improving durability.

HYDROFORMED HEADER PRIMARY

Improved performance due to exact matching of the oval exhaust port, with a smooth internal transition from oval to round. Increased durability from a reduction in welded connections. Improved fit from the exact repeatability of hydroform process.

HEADER RESONATOR

Developed in cooperation with the Honda HRC Team, our header resonator isn't just there for looks, it allows us to maximize power across the spectrum, while enhancing rider connectivity.

CAST MANIFOLD

Benefits include increased strength, durability, easier installation and removal.

The new RS-12 for the 2025 Honda CRF450R/RX also comes with an INS-32-K sound insert installed. This insert not only produces an ear pleasing exhaust note, it also makes the best power for the new Honda.

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

FEATURES

• Championship Proven - Already taken to victory in the 2024 SMX Championship by Jett Lawrence and runner-up by Hunter Lawrence.
• Performance Gains - +3.7% max horsepower and +1.3% max torque over stock.
• New Hydroformed Muffler - Weight-reducing hydroformed design for strength, durability, and optimized fit.
• Deep Draw One-Piece Resonator - Improves durability while enhancing sound and performance.
• Hydroformed Header Primary - Precisely matches oval exhaust port with smooth transition for improved flow and durability.
• Fewer Welds - Reduces weak points, increases strength, and improves consistency in fit.
• Header Resonator - Developed with Honda HRC; broadens powerband and enhances rider feel.
• Cast Manifold - Stronger, more durable, and easier to install/remove.
• INS-32-K Sound Insert - Produces a tuned, rider-friendly exhaust note while maintaining top performance.
• Made in the USA - Designed, developed, and manufactured with direct input from Team Honda HRC in the USA and Europe.