{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"a2d359da7e5d","name":"Factory 4.1 RCT Exhaust Silencer 19-26 Yamaha WR YZ 250 F FX - FMF 044453","sku":"06-9890.F4N","brand":"FMF Exhausts","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":2,"price":{"amount":611.96,"formatted":"£611.96"},"summary":"The FMF Racing Factory 4.1 RCT Slip-On exhaust system is engineered for riders seeking maximum performance, improved mass centralization, and enhanced durability. It features FMF's proprietary Resonance Chamber Technology and Factory Forward Engineering, utilizing aerospace-grade aluminum and a carbon fiber end cap for a lightweight yet strong construction. The shorter, robust design aids in mass centralization and reduces the risk of damage, while the stainless steel midpipe ensures longevity and corrosion resistance. This premium slip-on system offers substantial power and torque gains across the entire RPM range. It includes a screen-type spark arrestor and a 94dB quiet insert for versatility. The system also incorporates the Rapid Tuning System (RTS) for easy setup and adjustments, and its total weight is 7.8 lbs. This product is intended for closed-course competition use only. Item ID 044453.","attributes":[{"label":"General Product Group","value":"Exhaust Systems & Parts"},{"label":"General Product Type","value":"Silencer"},{"label":"Variant Id","value":"285410"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/06-9890_2EF4N/5c7b5872de8364b4.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/06-9890_2EF4N/5c7b5872de8364b4.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/06-9890_2EF4N/a343ccac7dcc6742.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/06-9890_2EF4N/0d3c15301482ce72.jpg"],"description":"The FMF Racing Factory 4.1 RCT Slip-On exhaust system is engineered for riders seeking maximum performance, improved mass centralization, and enhanced durability. It features FMF's proprietary Resonance Chamber Technology and Factory Forward Engineering, utilizing aerospace-grade aluminum and a carbon fiber end cap for a lightweight yet strong construction. The shorter, robust design aids in mass centralization and reduces the risk of damage, while the stainless steel midpipe ensures longevity and corrosion resistance. This premium slip-on system offers substantial power and torque gains across the entire RPM range. It includes a screen-type spark arrestor and a 94dB quiet insert for versatility. The system also incorporates the Rapid Tuning System (RTS) for easy setup and adjustments, and its total weight is 7.8 lbs. This product is intended for closed-course competition use only. Item ID 044453.","descriptionMarkdown":"### FMF Racing Factory 4.1 RCT Slip-On Exhaust Silencer\n\nThe FMF Racing Factory 4.1 RCT Slip-On is engineered for riders seeking the ultimate blend of mass centralisation, power, and durability. Developed with FMF's proprietary Resonance Chamber Technology™ and Factory Forward Engineering, this system utilises aerospace-grade materials, delivering both weight reduction and exceptional strength. The short, robust design improves mass centrality and decreases the risk of crash damage, while a carbon end cap and stainless steel midpipe ensure outstanding longevity and aesthetics. Manufactured entirely at FMF’s Southern California facility, this premium slip-on offers serious power gains across the RPM range for demanding off-road applications.\n\n**Key Features**\n\n- Closed course competition use only for maximum performance\n\n- Robust slip-on configuration with single outlet\n\n- Aerospace-grade aluminium construction with carbon fibre end cap for strength and lightweight\n\n- Rapid Tuning System (RTS) streamlines setup and adjustments\n\n- Reduced weight improves handling (7.8 lbs)\n\n- Substantial power and torque enhancements across all revs\n\n- Includes screen-type spark arrestor and 94dB quiet insert\n\n- Premium stainless steel midpipe for resilience and corrosion resistance\n\n**Specifications**\n\n- Type: Slip-On\n\n- Configuration: Single\n\n- Construction: Aluminium\n\n- Finish: Natural\n\n- Midpipe: Stainless Steel\n\n- End Cap: Carbon\n\n- Spark Arrestor: Screen Insert (included)\n\n- Quiet Insert: 94dB Insert (included)\n\n- Weight: 7.8 lbs","weightGrams":null,"fitments":[{"make":"YAMAHA","model":"WR 250F","cc":null,"notes":null,"years":"2023–2024"},{"make":"YAMAHA","model":"YZ 250F","cc":null,"notes":null,"years":"2019–2026"},{"make":"YAMAHA","model":"YZ 250FX","cc":null,"notes":null,"years":"2020–2026"},{"make":"YAMAHA","model":"YZF 250","cc":null,"notes":null,"years":"2019–2020"}],"collections":[{"name":"Exhaust Systems & Parts","url":"https://www.2brosparts.com/api/agent/collection/GB/exhaust-systems-parts"},{"name":"Silencer","url":"https://www.2brosparts.com/api/agent/collection/GB/silencer"}],"links":{"page":"https://www.2brosparts.com/products/factory-41-rct-exhaust-silencer-19-26-yamaha-wr-yz-250-f-fx-fmf-044453","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/a2d359da7e5d:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/a2d359da7e5d:1"}},"market":{"country":"GB","countryName":"United Kingdom","locale":"en-gb","currency":"GBP","exchangeRateFromGbp":1,"pricesIncludeUkVat":true,"checkoutTax":null,"delivery":[{"name":"Standard","description":"Orders £15.00–£59.99 · 2–4 business days","carrier":null,"estimatedDays":"2–4 business days","price":{"amount":4.99,"formatted":"£4.99"},"free":false,"minimumOrder":{"amount":0,"formatted":"£0.00","gbp":0},"weightGrams":null},{"name":"Standard","description":"Orders £60.00 and up · 2–4 business days","carrier":null,"estimatedDays":"2–4 business days","price":{"amount":0,"formatted":"£0.00"},"free":true,"minimumOrder":{"amount":60,"formatted":"£60.00","gbp":60},"weightGrams":null}],"storeUrl":"https://www.2brosparts.com"},"navigate":{"start":"https://www.2brosparts.com/api/agent","search":"https://www.2brosparts.com/api/agent/search/GB/{words+joined+with+plus}"},"howToBuy":{"summary":"Build a basket for the shopper and give them one checkout link. Every URL is a plain path (no query string) and a GET. Nothing is stored between calls.","checkoutLinkFormat":"https://www.2brosparts.com/api/agent/checkout/GB/{basketKey}:{quantity},{basketKey}:{quantity}","steps":["1. Find products: follow links in these responses, or fetch https://www.2brosparts.com/api/agent/search/GB/{words+joined+with+plus} (e.g. https://www.2brosparts.com/api/agent/search/GB/brake+pads). Every product has a basketKey.","2. Optional check: https://www.2brosparts.com/api/agent/basket/GB/{basketKey}:{quantity},{basketKey}:{quantity} returns stock, totals per delivery option and the checkout link.","3. Give the shopper the checkout link. Opening it fills their basket with exactly these items (replacing what was there) and opens checkout for United Kingdom. They pay on 2brosparts.com through Stripe."],"noFetchNeeded":"You can write the checkout link yourself from basketKeys and quantities; nothing has to be fetched first. Each product also has links.buyOneNow, a ready link for one unit.","stateless":"Nothing is saved on our side. The items part of the URL is the whole basket: to change it, write the link again with the new list.","itemsFormat":"basketKey:quantity pairs joined by commas, e.g. 04f24aad4d68:2,7c1e9a0b3f2d:1. Quantity defaults to 1. Up to 50 products, 100 each.","country":"GB is the shopper's delivery country. Swap it for theirs (US, DE, FR…) in any URL; currency, tax and delivery follow it.","tips":["Put everything the shopper wants in one link.","Optionally add your name as a last path segment on checkout links (…/checkout/GB/<items>/claude) so the sale is credited to you.","The checkout link is for the shopper's browser. Do not open it yourself.","Signed-in trade account holders see their trade prices at checkout."]}}