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Product image 1CRF450R 2021 RS-12 Stainless Full Exhaust, w/ Stainless Muffler
Product image 2CRF450R 2021 RS-12 Stainless Full Exhaust, w/ Stainless Muffler
Product image 3CRF450R 2021 RS-12 Stainless Full Exhaust, w/ Stainless Muffler
Product image 4CRF450R 2021 RS-12 Stainless Full Exhaust, w/ Stainless Muffler
Product image 5CRF450R 2021 RS-12 Stainless Full Exhaust, w/ Stainless Muffler
Product image 6CRF450R 2021 RS-12 Stainless Full Exhaust, w/ Stainless Muffler
Product image 7CRF450R 2021 RS-12 Stainless Full Exhaust, w/ Stainless Muffler
Product image 8CRF450R 2021 RS-12 Stainless Full Exhaust, w/ Stainless Muffler
Product image 9CRF450R 2021 RS-12 Stainless Full Exhaust, w/ Stainless Muffler
Product image 10CRF450R 2021 RS-12 Stainless Full Exhaust, w/ Stainless Muffler
Product image 11CRF450R 2021 RS-12 Stainless Full Exhaust, w/ Stainless Muffler
Product image 12CRF450R 2021 RS-12 Stainless Full Exhaust, w/ Stainless Muffler
Product image 13CRF450R 2021 RS-12 Stainless Full Exhaust, w/ Stainless Muffler
Product image 14https://www.youtube.com/watch?v=sVipqaVhbQQ

*Product may vary by application

CRF450R 2021 RS-12 Stainless Full Exhaust, w/ Stainless Muffler

SKU: 225850S320

Regular price $899.00

MADE IN USA

Signature Series Exhaust System


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Emissions Compliance Declaration: QUALIFIED MANUFACTURER DECLARED "REPLACEMENT PART"


WARNING: Cancer and Reproductive harm - www.p65warnings.ca.gov


The most anticipated 450cc motocross bike for 2021 is here! With an all-new designed chassis and engine, the new Honda CRF450 is sure to set new records.

Our new RS-12 system for the new Honda CRF450 has been in development for over a year, no stone has been left unturned in our efforts to innovate and create the best exhaust system available. In collaboration with Honda Japan, HRC Honda and MXGP World Champion Tim Gajser, we were able to deliver!

The Yoshimura RS-12 and the 2021 Honda CRF450—made with one goal to provide the most precision tuned machine in motocross competition.

  • Developed and tested in collaboration with HRC Honda Racing World Champion Tim Gajser and engineers the new RS-12 is ready for the race track and trails.
  • Aggressive intelligently designed, the RS-12 asymmetrical shaped muffler allows maximize capacity and incorporates a resonance chamber for managing sound and increasing usable power. RS-12's unique profile also provides more clearance for tire and brake caliper.
  • Unique oval manifold design was created using FEA process (Finite Element Analysis) and produced using state-of-the-art hydroforming process
  • Improved performance gains, weight reduction and fit when compared to previous generation design
  • Just like the works systems our Factory Racers use, RS-12 systems utilize precision machined joints. Machined joints provide a superior and exacting fit for joints by better securing the seal between two surfaces with a perfect 360 degree contact surface which translates into improved system life, fit and performance
  • Works-look matte carbon fiber end cap with industry leading design and innovation end cap detailing as expected from Yoshimura
  • Carbon end cap covers inner cap mounted design improves durability, and eases servicing as compared to other sandwich mounting designs most commonly found in the industry
  • New patent pending Precision Taper Fit (PTF) insert ring makes it easy to install and remove sound inserts and spark arrestors
  • Tapered muffler body inlet design of RS-12 enables the system to be pushed forward thus helping with weight centralization without sacrificing performance
  • Proudly designed, developed and made in the USA!
  • Repack Kits, optional Inserts and Spark Arresters are available for all models
Instructions and Parts Diagram
Instructions / Parts Diagram

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.

Attention International Customers: 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.

Signature Series Exhaust System

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Introducing Signature Series by Yoshimura - an offering of exhaust systems that a dealer can install with confidence. Our Signature Series lineup is the answer for today's dealer who is faced with a challenging marketplace. The applications for the Signature Series line cover the entire powersports spectrum, including many of our off-road applications. Everyone of our Championship Winning Motocross exhaust systems and nearly all of out ATV/Side-by-Side applications are all members of the Signature Series Family. All Signature Series components are tested, documented, and marked as required by federal and state regulations.

Vehicle Fitment

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  • Honda CRF450R 2021
  • Honda CRF450RX 2021
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