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Attention: You are purchasing closed course competition Product(s)

I acknowledge that the product(s) being purchased () was/were designed and intended for closed course competition use only. The product(s) is/are neither designed nor intended for use on public roads or land and is against Federal and State regulations to do so. By proceeding with this purchase, I , agree to only use the product(s) for closed course competition.

If an ECU tune was purchased, please send your unmodified and undamaged OEM ECU to TST Industries, located at 623 Pleasant St, Lake Helen, FL 32744.

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U.S. customers are offered a free shipping option for orders with a discounted subtotal greater than $150.00 (before taxes applied). The order's shipment destination must reside within the United States of America. The free shipping options still utilize our standard postage providers and 3rd party shipping companies. Does not apply to large items such as exhausts, stands, and bodywork shipping. All terms and conditions that apply to normal orders will continue to apply to orders with a free shipping option.

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An item returned within 30 days of purchase, that includes an accurate RMA#, in a perfectly new, unopened condition, and that complies with our other return policies, will not be charged a restocking fee.

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The most common product related questions are answered in the tabs section on this page. Be sure to carefully read through the "Product Details", "In the Box", and "FAQs" tabs. In addition, a lot of our products have comprehensive videos demonstrating installations and product features. You can find those videos in the "Videos" tab.

Note: Some product pages may not have all the tabs mentioned above. Please read through all the available tabs to find the answers to your questions. If you still need assistance, please use the "ASK A QUESTION ABOUT THIS PRODUCT" button below the tabs section.
NO ADDITIONAL COST: You pay at the time of checkout and never have to worry again.
COVERAGE: Our Limited Extended Warranty starts on the date of purchase. It covers all manufacturer defects for our TST Exclusive products. (Products manufactured by us with the exception of our WORX products)
EXPERT HELP: As always our team is here to help. If you’re unsure about this warranty or if your product is eligible, feel free to reach out to us and we can help answer any questions you may have!
PRODUCT ELIGIBILITY: TST will offer our Limited Extended Warranty on all products manufactured by TST Industries.
EASY CLAIMS PROCESS: Simply click the “Contact Us” page and fill out the “Returns Form” to begin the warranty process. Once our team receives your email and initiates the RMA, you can send your product back to us and we will repair/replace the product at no cost as long as a manufacturer defect is found. What qualifies as a manufacturer defect? Check out our Terms and Conditions for some examples!

Yoshimura Race RS-4 Stainless Full System Exhaust for the Honda CRF300L / Rally 2021+

  • Yoshimura Race RS-4 Stainless Full System Exhaust for the Honda CRF300L / Rally 2021+
  • Stainless exhaust canister features Yoshimura branding and carbon fiber exhaust cap.
  • Upgrade your CRF300L / Rally with Yoshimura performance.
  • Decrease weight while improving style, sound, and performance.
  • Compare the Yoshimura RS-4 Exhaust to the Stock Setup.

Yoshimura Race RS-4 Stainless Full System Exhaust for the Honda CRF300L / Rally 2021+

Yoshimura Race RS-4 Stainless Full System Exhaust for the Honda CRF300L / Rally 2021+

Gain performance, style, and that unmistakable Yoshimura sound with the new Race RS-4 Stainless Full System Exhaust.

Applications:
Honda CRF300L / Rally | 2021, 2022

AVAILABILITY: This item is shipping directly from Yoshimura. Shipping times may vary depending on Yoshimura availability. All other items will ship separately from TST within 1-3 business days.

RACE EXHAUST: This exhaust system is for closed course competition only and is not intended for public roads or land.

California residents will be charged state tax.

Have a Question About This Product?
SKU YOSH-1032=1
2021 +/CRF300L / Rally/Honda
Yoshimura Race RS-4 Stainless Full System Exhaust for the Honda CRF300L / Rally 2021+
 
Price: $649.00
Quantity Out of stock

ATTENTION:

If buying this product as part of the Buy Together bundle below, define these options there.

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RACE EXHAUST
This exhaust was designed and intended for closed course competition use ONLY. This product is neither designed nor intended for use on public roads or land and is against Federal and State regulations to do so.

  • Product Details
  • In the Box
  • Recommended Accessories

On The Dyno

Sound Clip

 

Features

  • Full system exhaust
  • Pentagonal-shaped sleeve
  • Front muffler cap functions as a polyresonant chamber to help reduce noise
  • Two-stage stepped baffle
  • Turn-out carbon fiber end-cap
  • Stainless steel header and tail-pipe
  • RS-4 Stainless Full System weight 9.5lbs vs Stock full system weight 12.3lbs
  • Made in the USA

Description

Small displacement dual sports, like the Honda CRF300L, are an absolute blast to ride, and adding a little bit of extra power, sound, and style only adds to the fun. Yoshimura's RS-4 Full System Exhaust gives 5.9% max HP while improving the power across the entire spectrum, enabling the 286cc motor to optimize performance while saving 2.8lbs when compared to the stock setup. The Yoshimura RS-4 provides an unmistakable sound and eye-catching style with a full stainless steel system that ends with a gorgeous gloss carbon fiber muffler cap.

RACE EXHAUST: This exhaust system is for closed-course competition only and is not intended for public roads or land.
  • Yoshimura Race RS-4 Full System Exhaust with Stainless Muffler
warning

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

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Reviews

TST 2 Pin LED Flasher Relay Gen 2
TST 2 Pin LED Flasher Relay Gen 2
The video made the install a breeze, I didn’t have to remove the fairings and literally didn’t need a single tool, hyperflash is gone on both lights, so much better than old resistors
Lorena
Nov 9, 2024
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