{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"81ec29b1fded","name":"Factory 4.1 RCT Slip-On Exhaust Silencer 24-25 Kawasaki KX 450 F X - FMF 042403","sku":"07-4005.F41.A","brand":"FMF Exhausts","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":2,"price":{"amount":635.5,"formatted":"£635.50"},"summary":"The FMF Racing Factory 4.1 RCT Stainless Slip-On with Carbon End Cap is engineered with Resonance Chamber Technology. It features a carbon end cap and a compact design for reduced crash damage vulnerability. This slip-on silencer centralises mass and delivers exceptional power gains across the RPM range. Constructed from aerospace-grade materials, it provides significant weight savings and is optimised for rapid tuning and easy fitment. Features include FMF Resonance Chamber Technology, a shortened crash-resistant structure with Factory Forward Engineering, significant power boosts, a lightweight aluminium canister with carbon end cap, and a Rapid Tuning System. It is manufactured from premium alloy-grade titanium and stainless steel. A 94dB quiet insert and spark arrestor screen are included. This product is designed for closed course use only. Item ID 042403. Type: Slip-On. Configuration: Single. Construction: Aluminium (muffler), Stainless Steel (midpipe), Carbon (end cap). Finish: Gray anodised. Spark Arrestor: Screen insert included. Quiet Insert: 94dB insert included. Carb Warning: No. Intended use: Closed course.","attributes":[],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/07-4005_2EF41_2EA/6caab504f5617126.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/07-4005_2EF41_2EA/6caab504f5617126.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/07-4005_2EF41_2EA/4e852b2eb67eac0c.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/07-4005_2EF41_2EA/142b4db640afba08.jpg"],"description":"The FMF Racing Factory 4.1 RCT Stainless Slip-On with Carbon End Cap is engineered with Resonance Chamber Technology. It features a carbon end cap and a compact design for reduced crash damage vulnerability. This slip-on silencer centralises mass and delivers exceptional power gains across the RPM range. Constructed from aerospace-grade materials, it provides significant weight savings and is optimised for rapid tuning and easy fitment. Features include FMF Resonance Chamber Technology, a shortened crash-resistant structure with Factory Forward Engineering, significant power boosts, a lightweight aluminium canister with carbon end cap, and a Rapid Tuning System. It is manufactured from premium alloy-grade titanium and stainless steel. A 94dB quiet insert and spark arrestor screen are included. This product is designed for closed course use only. Item ID 042403. Type: Slip-On. Configuration: Single. Construction: Aluminium (muffler), Stainless Steel (midpipe), Carbon (end cap). Finish: Gray anodised. Spark Arrestor: Screen insert included. Quiet Insert: 94dB insert included. Carb Warning: No. Intended use: Closed course.","descriptionMarkdown":"### FMF Racing Factory 4.1 RCT Slip-On Exhaust Silencer with Carbon End Cap\n\n Elevate your motorcycle's performance with the FMF Racing Factory 4.1 RCT Slip-On Exhaust Silencer. Engineered with advanced Resonance Chamber Technology™, this silencer is designed to deliver substantial power gains across the entire RPM range. Its compact and shortened structure, featuring Factory Forward Engineering, offers improved crash resistance and centralizes mass for better handling.\n\n**Key Features:**\n\n \n- Utilizes FMF's Resonance Chamber Technology™ for enhanced acoustics and performance.\n \n- Compact, crash-resistant design with Factory Forward Engineering.\n \n- Provides significant power increases throughout the RPM band.\n \n- Lightweight aluminum canister construction.\n \n- Stylish carbon fiber end cap.\n \n- Features a Rapid Tuning System for quick and easy adjustments.\n \n- Constructed from premium alloy-grade titanium and stainless steel.\n \n- Includes a 94dB quiet insert and a spark arrestor screen.\n \n- Optimized for rapid tuning and simple fitment.\n \n- Designed for closed course use only.\n\n**Specifications:**\n\n \n- Type: Slip-On\n \n- Configuration: Single\n \n- Muffler Construction: Aluminum\n \n- Midpipe Construction: Stainless Steel\n \n- End Cap Construction: Carbon Fiber\n \n- Finish: Gray anodized\n \n- Spark Arrestor: Included as a screen insert\n \n- Quiet Insert: 94dB insert included","weightGrams":null,"fitments":[{"make":"KAWASAKI","model":"KX 450F","cc":null,"notes":null,"years":"2024–2025"},{"make":"KAWASAKI","model":"KX 450X","cc":null,"notes":null,"years":"2024–2025"}],"collections":[],"links":{"page":"https://www.2brosparts.com/products/factory-41-rct-slip-on-exhaust-silencer-24-25-kawasaki-kx-450-f-x-fmf-042403","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/81ec29b1fded:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/81ec29b1fded: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."]}}