{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"27bb3003dbe1","name":"Factory 4.1 RCT Exhaust Silencer 20-21 Yamaha WR 250 F - FMF 044473","sku":"06-9949.FMF.FCT","brand":"FMF Exhausts","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":2,"price":{"amount":564.92,"formatted":"£564.92"},"summary":"The FMF Racing Factory 4.1 RCT Stainless Slip-On Exhaust with Carbon End Cap features FMF Resonance Chamber Technology for maximised engine performance and minimised crash vulnerability. Designed with Factory Forward Engineering to centralise mass, this slip-on system delivers power gains across the RPM range and weight reduction, utilising aerospace-grade materials and American manufacturing. It includes a carbon end cap and incorporates a Rapid Tuning System for rapid tuning and consistent durability. Features include Resonance Chamber Technology, a compact design for improved mass centralisation and reduced crash exposure, aerospace-grade proprietary blend materials for durability and weight savings, natural aluminium muffler with carbon fibre end cap, significant power gains throughout the RPM spectrum, and the Rapid Tuning System for easy adjustments. Includes a screen spark arrestor and a 94dB quiet insert for sound and emission compliance. Designed for closed course competition use only. Item ID: 044473. Type: Slip-On. Configuration: Single. Construction material: Aluminium. Finish: Natural. Mid-pipe material: Stainless steel. End cap material: Carbon fibre. Spark arrestor: Screen insert (included). Quiet insert: 94dB insert (included). Weight: 7.1 lbs (3.22 kg). Carb warning: Yes. Manufacturer: FMF Exhausts.","attributes":[{"label":"General Product Group","value":"Exhaust Systems & Parts"},{"label":"General Product Type","value":"Silencer"},{"label":"Variant Id","value":"301519"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/06-9949_2EFMF_2EFCT/2b4325d907fd83fc.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/06-9949_2EFMF_2EFCT/2b4325d907fd83fc.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/06-9949_2EFMF_2EFCT/86faf8714695a5bc.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/06-9949_2EFMF_2EFCT/623d41fb91c8b829.jpg"],"description":"The FMF Racing Factory 4.1 RCT Stainless Slip-On Exhaust with Carbon End Cap features FMF Resonance Chamber Technology for maximised engine performance and minimised crash vulnerability. Designed with Factory Forward Engineering to centralise mass, this slip-on system delivers power gains across the RPM range and weight reduction, utilising aerospace-grade materials and American manufacturing. It includes a carbon end cap and incorporates a Rapid Tuning System for rapid tuning and consistent durability. Features include Resonance Chamber Technology, a compact design for improved mass centralisation and reduced crash exposure, aerospace-grade proprietary blend materials for durability and weight savings, natural aluminium muffler with carbon fibre end cap, significant power gains throughout the RPM spectrum, and the Rapid Tuning System for easy adjustments. Includes a screen spark arrestor and a 94dB quiet insert for sound and emission compliance. Designed for closed course competition use only. Item ID: 044473. Type: Slip-On. Configuration: Single. Construction material: Aluminium. Finish: Natural. Mid-pipe material: Stainless steel. End cap material: Carbon fibre. Spark arrestor: Screen insert (included). Quiet insert: 94dB insert (included). Weight: 7.1 lbs (3.22 kg). Carb warning: Yes. Manufacturer: FMF Exhausts.","descriptionMarkdown":"### FMF Racing Factory 4.1 RCT Exhaust Silencer with Carbon End Cap\n\nExperience enhanced performance and durability with the FMF Racing Factory 4.1 RCT Stainless Slip-On Exhaust. This system features advanced FMF Resonance Chamber Technology™ to maximize engine output and minimize vulnerability. Its Factory Forward Engineering centralizes mass for improved handling and reduced crash impact. Precision manufactured in the USA using aerospace-grade materials, this slip-on system provides significant power gains across the entire RPM range and substantial weight reduction.\n\n**Key Features:**\n\n \n- FMF Resonance Chamber Technology™ for optimized performance\n \n- Compact design moves mass closer to the motor, enhancing centralization and reducing crash exposure\n \n- Constructed from aerospace-grade proprietary blend materials for maximum durability and weight savings\n \n- Natural aluminum muffler complemented by a carbon fiber end cap\n \n- Delivers significant power gains throughout the entire RPM spectrum\n \n- Features the Rapid Tuning System (RTS) for straightforward adjustments\n \n- Includes a screen spark arrestor and a 94dB quiet insert for compliance\n \n- Designed for closed course competition use only\n\n**Specifications:**\n\n \n- Type: Slip-On\n \n- Configuration: Single\n \n- Muffler Construction Material: Aluminum\n \n- Muffler Finish: Natural\n \n- Mid-pipe Material: Stainless Steel\n \n- End Cap Material: Carbon Fiber\n \n- Spark Arrestor: Screen insert (included)\n \n- Quiet Insert: 94dB insert (included)\n \n- Weight: 7.1 lbs (3.22 kg)\n \n- CARB Warning: Yes","weightGrams":null,"fitments":[{"make":"YAMAHA","model":"WR 250F","cc":null,"notes":null,"years":"2020–2021"},{"make":"YAMAHA","model":"WRF 250","cc":null,"notes":null,"years":"2020–2021"}],"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-20-21-yamaha-wr-250-f-fmf-044473","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/27bb3003dbe1:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/27bb3003dbe1:1"}},"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."]}}