{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"ea88009f6a19","name":"Factory 4.1 RCT Exhaust Silencer 09-11 Kawasaki KX 450 F - FMF 042291","sku":"06-1754.FMF.FAC","brand":"FMF Exhausts","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":564.92,"formatted":"£564.92"},"summary":"The Factory 4.1 RCT Stainless SL Slip-On with Carbon End Cap delivers advanced performance with FMF’s Resonance Chamber Technology optimizing power output and mass centralisation. Built from aerospace grade materials, this slip-on exhaust offers substantial weight savings, improved crash resilience and the Rapid Tuning System for seamless adjustments. Its precise engineering ensures reduced overall length and an optimally positioned muffler for enhanced handling and durability. Features include internal and external FMF Resonance Chamber Technology, a shorter forward-positioned muffler design for centralised mass and reduced crash vulnerability, and construction from aerospace grade aluminium and stainless steel with a carbon fibre end cap. It provides massive power gains across the RPM range and significant weight reduction over stock systems. The natural aluminium finish with carbon end cap offers strength and style. A screen-type spark arrestor insert and 94dB quiet insert are included. Manufactured 100% in FMF’s Southern California factory. For closed course competition use only. Item ID: 042291. Type: Slip-On. Configuration: Single. Construction: Aluminium. Finish: Natural. Midpipe: Stainless steel. Endcap: Carbon fibre. Spark Arrestor: Screen insert (included). Quiet Insert: 94dB insert (included). Weight: 5 lbs approximate.","attributes":[{"label":"General Product Group","value":"Exhaust Systems & Parts"},{"label":"General Product Type","value":"Silencer"},{"label":"Variant Id","value":"209300"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/06-1754_2EFMF_2EFAC/6ffd514187c8c85b.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/06-1754_2EFMF_2EFAC/6ffd514187c8c85b.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/06-1754_2EFMF_2EFAC/a51379012ca67a95.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/06-1754_2EFMF_2EFAC/a623fe691b79e0b6.jpg"],"description":"The Factory 4.1 RCT Stainless SL Slip-On with Carbon End Cap delivers advanced performance with FMF’s Resonance Chamber Technology optimizing power output and mass centralisation. Built from aerospace grade materials, this slip-on exhaust offers substantial weight savings, improved crash resilience and the Rapid Tuning System for seamless adjustments. Its precise engineering ensures reduced overall length and an optimally positioned muffler for enhanced handling and durability. Features include internal and external FMF Resonance Chamber Technology, a shorter forward-positioned muffler design for centralised mass and reduced crash vulnerability, and construction from aerospace grade aluminium and stainless steel with a carbon fibre end cap. It provides massive power gains across the RPM range and significant weight reduction over stock systems. The natural aluminium finish with carbon end cap offers strength and style. A screen-type spark arrestor insert and 94dB quiet insert are included. Manufactured 100% in FMF’s Southern California factory. For closed course competition use only. Item ID: 042291. Type: Slip-On. Configuration: Single. Construction: Aluminium. Finish: Natural. Midpipe: Stainless steel. Endcap: Carbon fibre. Spark Arrestor: Screen insert (included). Quiet Insert: 94dB insert (included). Weight: 5 lbs approximate.","descriptionMarkdown":"### FMF Factory 4.1 RCT Slip-On Exhaust with Carbon End Cap\n\n Experience peak performance with the FMF Factory 4.1 RCT Stainless SL Slip-On Exhaust System. Engineered with FMF’s advanced Resonance Chamber Technology™, this system is designed to optimize power output and centralize mass, making it ideal for professional racing applications. Constructed in FMF's Southern California facility using premium, aerospace-grade materials, this slip-on offers significant weight savings and enhanced durability. The innovative Rapid Tuning System allows for straightforward adjustments, while the shorter, forward-positioned muffler design improves handling and reduces vulnerability during impacts.\n\n#### Key Features:\n\n \n- Features both internal and external FMF Resonance Chamber Technology™ for optimized performance.\n \n- Muffler is shorter and positioned more forward, centralizing mass and improving crash resilience.\n \n- Constructed from aerospace-grade aluminum and stainless steel with a stylish carbon fiber end cap.\n \n- Delivers substantial power gains across the entire RPM range.\n \n- Offers a significant reduction in weight compared to stock exhaust systems.\n \n- Equipped with the Rapid Tuning System (RTS) for quick and easy adjustments.\n \n- Natural aluminum finish with a carbon fiber end cap provides durability and a high-performance aesthetic.\n \n- Includes a screen-type spark arrestor insert and a 94dB quiet insert.\n \n- Proudly manufactured 100% in FMF’s Southern California factory.\n \n- This product is intended for closed course competition use only.\n\n#### Specifications:\n\n \n- Type: Slip-On\n \n- Configuration: Single\n \n- Construction Material: Aluminum\n \n- Finish: Natural\n \n- Midpipe Material: Stainless steel\n \n- Endcap Material: Carbon fiber\n \n- Spark Arrestor: Screen insert included\n \n- Quiet Insert: 94dB insert included\n \n- Approximate Weight: 5 lbs","weightGrams":null,"fitments":[{"make":"KAWASAKI","model":"KX 450F","cc":null,"notes":null,"years":"2009–2011"}],"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-09-11-kawasaki-kx-450-f-fmf-042291","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/ea88009f6a19:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/ea88009f6a19:1"}},"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."]}}