{"product_id":"yoshimura-rs-12-stainless-titanium-full-exhaust-with-titanium-muffler-for-honda-crf450r-rx-225870s720","title":"Yoshimura RS-12 Stainless, Titanium Full Exhaust with Titanium Muffler for Honda CRF450R\/RX – 225870S720","description":"\u003cdiv class=\"trd trd--yoshimura\"\u003e\n\u003csection class=\"trd-hero\"\u003e\u003cp class=\"trd-eyebrow\"\u003eYoshimura · RS-12 · Full System\u003c\/p\u003e\n\u003ch2 class=\"trd-headline\"\u003eRS-12evo Full System for CRF450R\/RX 2027\u003c\/h2\u003e\n\u003cp class=\"trd-lead\"\u003eThe Yoshimura RS-12evo Signature Series Exhaust System is a full system engineered for the Honda CRF450R 2027 and Honda CRF450RX 2027. This SS\/TI configuration combines stainless and titanium pipe materials with a titanium muffler to deliver a refined setup built around the latest CRF450R\/RX platform updates.\u003c\/p\u003e\n\u003cp class=\"trd-lead\"\u003eYoshimura positions the RS-12evo as the latest evolution of its RS-12 line, developed to improve rideability, power and torque while also reducing weight. Design details like a hydroformed header primary, cast manifold, and an updated muffler\/resonator layout are focused on fit, durability, and a clean integration with the motorcycle’s surrounding components; see the fitment table below for supported models.\u003c\/p\u003e\n\u003cul class=\"trd-chips\"\u003e\n\u003cli class=\"trd-chip\"\u003e\n\u003cspan class=\"trd-chip-label\"\u003ePart Number\u003c\/span\u003e\u003cspan class=\"trd-chip-value\"\u003e225870S720\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"trd-chip\"\u003e\n\u003cspan class=\"trd-chip-label\"\u003eMaterial\u003c\/span\u003e\u003cspan class=\"trd-chip-value\"\u003eStainless, Titanium\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"trd-chip\"\u003e\n\u003cspan class=\"trd-chip-label\"\u003eSeries\u003c\/span\u003e\u003cspan class=\"trd-chip-value\"\u003eRS-12\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli class=\"trd-chip\"\u003e\n\u003cspan class=\"trd-chip-label\"\u003eFits\u003c\/span\u003e\u003cspan class=\"trd-chip-value\"\u003eHonda CRF450R \/ CRF450RX\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/section\u003e\u003cdiv class=\"trd-cards trd-cards--3\"\u003e\n\u003carticle class=\"trd-card\"\u003e\u003cdiv class=\"trd-card-body\"\u003e\n\u003cp class=\"trd-label\"\u003eEngineering\u003c\/p\u003e\n\u003ch3 class=\"trd-card-title\"\u003eHydroformed titanium muffler\u003c\/h3\u003e\n\u003cp class=\"trd-card-text\"\u003eRS-12evo uses an all-new hydroformed titanium muffler designed for efficient use of the area next to the airbox, subframe and shock. Yoshimura states the fitment is engineered to nest with the stock side panel, creating a custom tailored layout around the bike’s packaging.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/article\u003e\u003carticle class=\"trd-card\"\u003e\u003cdiv class=\"trd-card-body\"\u003e\n\u003cp class=\"trd-label\"\u003eTechnology\u003c\/p\u003e\n\u003ch3 class=\"trd-card-title\"\u003eTwo-piece muffler resonator\u003c\/h3\u003e\n\u003cp class=\"trd-card-text\"\u003eAn all-new two-piece resonator is integrated into the RS-12evo muffler. Yoshimura explains that it fine tunes the power, reduces sound, and further improves durability, adding another layer of refinement to the system’s overall design.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/article\u003e\u003carticle class=\"trd-card\"\u003e\u003cdiv class=\"trd-card-body\"\u003e\n\u003cp class=\"trd-label\"\u003eFitment\u003c\/p\u003e\n\u003ch3 class=\"trd-card-title\"\u003eHydroformed header primary\u003c\/h3\u003e\n\u003cp class=\"trd-card-text\"\u003eThe hydroformed header primary is designed to match the oval exhaust port and provide a smooth internal transition from oval to round. Yoshimura notes increased durability by reducing welded connections, along with improved fit through the repeatability of the hydroforming process.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/article\u003e\n\u003c\/div\u003e\n\u003csection class=\"trd-story\"\u003e\u003cfigure class=\"trd-story-media\"\u003e\u003cimg class=\"trd-story-img\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0585\/4884\/6743\/files\/yoshimura-225870s720-rs12-stainless-titanium-exhaust-main.jpg?v=1792269147\u0026amp;width=1400\" alt=\"Yoshimura RS-12 Stainless, Titanium Full Exhaust with Titanium Muffler for Honda CRF450R\/RX – 225870S720 – SS\/TI full system design\" width=\"1400\" height=\"933\" loading=\"lazy\"\u003e\u003c\/figure\u003e\u003cdiv class=\"trd-story-copy\"\u003e\n\u003cp class=\"trd-label\"\u003eMaterials\u003c\/p\u003e\n\u003ch3 class=\"trd-story-title\"\u003eSS\/TI full system design\u003c\/h3\u003e\n\u003cp class=\"trd-story-text\"\u003eThis RS-12evo Signature Series Exhaust System is a full system that pairs stainless and titanium pipe materials with a titanium muffler. Yoshimura describes the RS-12evo as an all-new system for the updated CRF450R platform, with development aimed at improving rideability along with power and torque, while also reducing weight.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"trd-story trd-story--reverse\"\u003e\u003cfigure class=\"trd-story-media\"\u003e\u003cimg class=\"trd-story-img\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0585\/4884\/6743\/files\/yoshimura-225870s720-rs12-stainless-titanium-exhaust-view.jpg?v=1792269146\u0026amp;width=1400\" alt=\"Yoshimura RS-12 Stainless, Titanium Full Exhaust with Titanium Muffler for Honda CRF450R\/RX – 225870S720 – Fit-focused muffler packaging\" width=\"1400\" height=\"933\" loading=\"lazy\"\u003e\u003c\/figure\u003e\u003cdiv class=\"trd-story-copy\"\u003e\n\u003cp class=\"trd-label\"\u003eEngineering\u003c\/p\u003e\n\u003ch3 class=\"trd-story-title\"\u003eFit-focused muffler packaging\u003c\/h3\u003e\n\u003cp class=\"trd-story-text\"\u003eYoshimura’s updated RS-12evo muffler design centers on tight, purposeful packaging around the motorcycle. The hydroformed titanium muffler is shaped to make efficient use of the area next to the airbox, subframe and shock, and Yoshimura states it is engineered to nest with the stock side panel. A two-piece muffler resonator is also incorporated to fine tune the power, reduce sound, and improve durability.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"trd-story\"\u003e\u003cfigure class=\"trd-story-media\"\u003e\u003cimg class=\"trd-story-img\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0585\/4884\/6743\/files\/yoshimura-225870s720-rs12-stainless-titanium-exhaust-view-2.jpg?v=1792269147\u0026amp;width=1400\" alt=\"Yoshimura RS-12 Stainless, Titanium Full Exhaust with Titanium Muffler for Honda CRF450R\/RX – 225870S720 – Header and manifold details\" width=\"1400\" height=\"933\" loading=\"lazy\"\u003e\u003c\/figure\u003e\u003cdiv class=\"trd-story-copy\"\u003e\n\u003cp class=\"trd-label\"\u003eFitment\u003c\/p\u003e\n\u003ch3 class=\"trd-story-title\"\u003eHeader and manifold details\u003c\/h3\u003e\n\u003cp class=\"trd-story-text\"\u003eUp front, RS-12evo features a hydroformed header primary intended to match the oval exhaust port and create a smooth internal transition from oval to round. Yoshimura attributes improved durability to fewer welded connections and emphasizes the repeatable fit made possible by the hydroforming process. The system also includes a cast manifold, which Yoshimura lists as providing increased strength and durability along with easier installation and removal.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"trd-story trd-story--reverse\"\u003e\u003cfigure class=\"trd-story-media\"\u003e\u003cimg class=\"trd-story-img\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0585\/4884\/6743\/files\/yoshimura-225870s720-rs12-stainless-titanium-exhaust-view-3.jpg?v=1792269146\u0026amp;width=1400\" alt=\"Yoshimura RS-12 Stainless, Titanium Full Exhaust with Titanium Muffler for Honda CRF450R\/RX – 225870S720 – Development background\" width=\"1400\" height=\"933\" loading=\"lazy\"\u003e\u003c\/figure\u003e\u003cdiv class=\"trd-story-copy\"\u003e\n\u003cp class=\"trd-label\"\u003eDevelopment\u003c\/p\u003e\n\u003ch3 class=\"trd-story-title\"\u003eDevelopment background\u003c\/h3\u003e\n\u003cp class=\"trd-story-text\"\u003eYoshimura states the CRF450R RS-12evo is designed, developed and made in the USA with the help of Team Honda HRC race teams in the USA, Europe and Japan. The system also incorporates a header resonator developed in cooperation with Honda HRC teams; Yoshimura notes this component is used to maximize power across the spectrum while enhancing rider connectivity.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"trd-section trd-section--specs\"\u003e\u003ch2 class=\"trd-section-title\"\u003eSpecifications\u003c\/h2\u003e\n\u003cdiv class=\"trd-table-wrap\"\u003e\u003ctable class=\"trd-table trd-table--specs\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePart Number\u003c\/th\u003e\n\u003ctd\u003e225870S720\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eYoshimura\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eProduct Line\u003c\/th\u003e\n\u003ctd\u003eSignature Series Exhaust System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eSeries\u003c\/th\u003e\n\u003ctd\u003eRS-12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eSystem Type\u003c\/th\u003e\n\u003ctd\u003eFull System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePipe Material\u003c\/th\u003e\n\u003ctd\u003eStainless, Titanium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eMuffler\u003c\/th\u003e\n\u003ctd\u003eTitanium Muffler\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eShipping Weight\u003c\/th\u003e\n\u003ctd\u003e1 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBarcode\u003c\/th\u003e\n\u003ctd\u003e00840025920088\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eEmissions Compliance\u003c\/th\u003e\n\u003ctd\u003eQUALIFIED MANUFACTURER DECLARED \"REPLACEMENT PART\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003c\/div\u003e\u003c\/section\u003e\u003csection class=\"trd-section trd-section--fitment\"\u003e\u003ch2 class=\"trd-section-title\"\u003eFitment\u003c\/h2\u003e\n\u003cdiv class=\"trd-table-wrap\"\u003e\u003ctable class=\"trd-table\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth scope=\"col\"\u003eMake\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eModel\u003c\/th\u003e\n\u003cth scope=\"col\"\u003eModel Years\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eCRF450R\u003c\/td\u003e\n\u003ctd\u003e2027\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHonda\u003c\/td\u003e\n\u003ctd\u003eCRF450RX\u003c\/td\u003e\n\u003ctd\u003e2027\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cp class=\"trd-caption\"\u003eFitment as listed by Yoshimura for part number 225870S720.\u003c\/p\u003e\u003c\/section\u003e\u003csection class=\"trd-section trd-section--docs\"\u003e\u003ch2 class=\"trd-section-title\"\u003eInstallation \u0026amp; Documents\u003c\/h2\u003e\n\u003cp class=\"trd-docs\"\u003e\u003ca class=\"trd-button\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0585\/4884\/6743\/files\/yoshimura-225870s720-installation-manual.pdf?v=1792269142\" target=\"_blank\" rel=\"noopener\"\u003eInstructions \/ What's Included (PDF)\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"trd-caption\"\u003eProvided by Yoshimura. Opens in a new tab.\u003c\/p\u003e\u003c\/section\u003e\n\u003c\/div\u003e","brand":"Yoshimura","offers":[{"title":"Default Title","offer_id":68079815393431,"sku":"225870S720","price":1249.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0585\/4884\/6743\/files\/yoshimura-225870s720-rs12-stainless-titanium-exhaust-main.jpg?v=1792269147","url":"https:\/\/allamericanktm.com\/products\/yoshimura-rs-12-stainless-titanium-full-exhaust-with-titanium-muffler-for-honda-crf450r-rx-225870s720","provider":"All American KTM","version":"1.0","type":"link"}