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Yoshimura RS-12 Exhaust System Kawasaki KX450 / KX450X / KX450SR 2019-2023

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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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This product is legal in California only for racing vehicles which may never be used, registered or licensed for use upon a highway.

Yoshimura RS-12 Exhaust System Kawasaki KX450 / KX450X / KX450SR 2019-2023 Resources

Yoshimura RS-12 Exhaust System Kawasaki KX450 / KX450X / KX450SR

After three years of development and testing Yoshimura is pleased to announce the RS-12 full system exhaust! With the help of incredibly talented factory sponsored athletes, technicians, devoted engineers and a will to raise the bar, the RS-12 has now arrived.

One look and you can see the RS-12 is like nothing else on the market. As you get closer you will notice many performance details placed throughout the system, from the matte carbon fiber end cap with decal inlays to the precise machined joints, this system takes it to the next level.


  • Developed and tested over 24 months of factory level racing
  • Aggressive, intelligently designed, asymmetrical shape of the RS-12 allows for maximum muffler volume which helps manage sound, add power and provide more clearance for the rear tire and brake caliper
  • Improved performance gains and weight reduction
  • Just like the works systems Factory Racers use, RS-12 systems utilize precision machined joints which provide a superior fit and improve system life and performance
  • Works-look matte carbon fiber end cap with industry leading design
  • Carbon end cap covers inner cap mounted design which improves durability and eases servicing as compared to other sandwich mounting designs
  • 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 the 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
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This product is vehicle specific. Click here to select your vehicle to ensure fitment.

This Product Fits:

KX450 2019, 2020, 2021, 2022, 2023
KX450SR 2022, 2023
KX450X 2021, 2022, 2023

This item is also available for 52 other models:

Gas Gas
EX 450F 2021-2023
MC 250F 2021-2023
MC 250F 2024
MC 250F Factory Edition 2023
MC 350F 2022-2023
MC 350F 2024
MC 450F 2021-2023
MC 450F 2024
MC 450F Factory Edition 2023
CRF250R 2022-2024
CRF250RX 2022-2024
CRF450R 2021-2024
CRF450R 50th Anniversary Edition 2023
CRF450R-S 2023-2024
CRF450R Works Edition 2021-2024
CRF450RX 2021-2024
FC250 2019-2022
FC250 2023-2024
FC250 Rockstar Edition 2022
FC350 2019-2022
FC350 2023-2024
FC450 2019-2022
FC450 2023-2024
FC450 Rockstar Edition 2019-2021
FC450 Rockstar Edition 2022
FX450 2019-2022
250 SX-F 2019-2022
250 SX-F 2023-2024
250 SX-F Factory Edition 2021
250 SX-F Factory Edition 2022
250 XC-F 2019-2022
350 SX-F 2019-2022
350 SX-F 2023-2024
350 XC-F 2019-2022
350 XC-F Kailub Russell 2021
450 SX-F 2019-2022
450 SX-F 2023-2024
450 SX-F Factory Edition 2019-2021
450 SX-F Factory Edition 2022
450 XC-F 2019-2022
KX250 2021-2024
KX250X 2021-2024
RMZ250 2019-2024
RMZ450 2018-2024
WR250F 2020-2024
YZ250F 2019-2023
YZ250F Monster Energy Race Edition 2022-2023
YZ250FX 2020-2024
YZ450F 2020-2022
YZ450F 2023-2024
YZ450F Monster Energy Race Edition 2021-2022
YZ450F Monster Energy Race Edition 2023
Product Style Item # Store SKU Manufacturer Product # Availability
Product Style Stainless Steel/Aluminum/Carbon Fiber Item # 10026243 Store SKU Manufacturer Product # 244720S320 Availability In Stock: Ships within 24 hours
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