{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"b4427f344cdf","name":"END OF LINE Factory 4.1 RCT Exhaust Silencer 16-18 Kawasaki KX 450 F - FMF 042331","sku":"06-1781.FMF.FTN","brand":"FMF Exhausts","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":1,"price":{"amount":435.04,"formatted":"£435.04"},"summary":"The FMF Factory 4.1 RCT exhaust silencer features FMF Resonance Chamber Technology™ internally and externally. It has a shorter overall length to reduce susceptibility to crash damage and incorporates Factory Forward Engineering for mass centralization. Constructed from aerospace-grade titanium, this silencer is 100% manufactured in Southern California. It offers massive power gains throughout the RPM range and significant weight savings. Features include the new RTS (Rapid Tuning System), a proprietary blend of alloy grade titanium, and compatibility with FMF or stock OEM headers. This is a slip-on, single configuration exhaust with a natural titanium muffler, titanium end cap, and titanium midpipe. It includes a screen insert spark arrestor and a 94dB quiet insert. Weight is 4.3 lbs. For closed course use only. Part No. 042331.","attributes":[{"label":"General Product Group","value":"Exhaust Systems & Parts"},{"label":"General Product Type","value":"Silencer"},{"label":"Variant Id","value":"209393"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/06-1781_2EFMF_2EFTN/993148323475d48a.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/06-1781_2EFMF_2EFTN/993148323475d48a.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/06-1781_2EFMF_2EFTN/ac5267e3774bc0e9.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/06-1781_2EFMF_2EFTN/f4e4e300fbb1d735.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/06-1781_2EFMF_2EFTN/529a693fd4edb1f9.jpg"],"description":"The FMF Factory 4.1 RCT exhaust silencer features FMF Resonance Chamber Technology™ internally and externally. It has a shorter overall length to reduce susceptibility to crash damage and incorporates Factory Forward Engineering for mass centralization. Constructed from aerospace-grade titanium, this silencer is 100% manufactured in Southern California. It offers massive power gains throughout the RPM range and significant weight savings. Features include the new RTS (Rapid Tuning System), a proprietary blend of alloy grade titanium, and compatibility with FMF or stock OEM headers. This is a slip-on, single configuration exhaust with a natural titanium muffler, titanium end cap, and titanium midpipe. It includes a screen insert spark arrestor and a 94dB quiet insert. Weight is 4.3 lbs. For closed course use only. Part No. 042331.","descriptionMarkdown":"### FMF Factory 4.1 RCT Exhaust Silencer\n\nUpgrade your ride with the FMF Factory 4.1 RCT Exhaust Silencer, engineered for superior performance and durability. This slip-on exhaust system features FMF's latest Resonance Chamber Technology™ both internally and externally for significant power gains across the entire RPM range.\n\nIts shorter overall length is designed to reduce susceptibility to crash damage and is part of FMF's Factory Forward Engineering, which moves the muffler closer to the motor to centralize mass. Constructed from aerospace-grade titanium, this silencer meets FMF's exacting specifications and is manufactured entirely in their Southern California factory.\n\n#### Key Features:\n\n \n- Resonance Chamber Technology™: Internal and external chambers for enhanced power delivery.\n \n- Compact Design: Shorter length reduces crash damage risk and aids in mass centralization.\n \n- Aerospace-Grade Titanium: Constructed from high-quality, proprietary titanium alloy for strength and light weight.\n \n- Massive Power Gains: Experience significant improvements throughout the RPM range.\n \n- Huge Weight Savings: Reduce the overall weight of your motorcycle.\n \n- RTS (Rapid Tuning System): Allows for quick and easy tuning adjustments.\n \n- Versatile Fitment: Can be used with either FMF or stock OEM headers.\n \n- Included Accessories: Comes with a screen insert spark arrestor and a 94dB quiet insert.\n\n#### Specifications:\n\n \n- Type: Slip-On\n \n- Configuration: Single\n \n- Construction: Titanium Muffler, Titanium Midpipe, Titanium End Cap\n \n- Finish: Natural\n \n- Spark Arrestor: Screen Insert (included)\n \n- Quiet Insert: 94dB Insert (included)\n \n- Weight: 4.3 lbs.\n\n**Notice:** Closed Course Use Only","weightGrams":null,"fitments":[{"make":"KAWASAKI","model":"KX 450F","cc":null,"notes":null,"years":"2016–2018"}],"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/end-of-line-factory-41-rct-exhaust-silencer-16-18-kawasaki-kx-450-f-fmf-042331","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/b4427f344cdf:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/b4427f344cdf: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."]}}