{"about":"Prices are for United Kingdom in GBP. Every URL here is a plain path you can fetch directly.","product":{"basketKey":"15ce693a7c31","name":"Factory 4.1 RCT Slip-On Exhaust Silencer 15-19 KTM Husqvarna 250 350 450 500 501 - FMF 045594","sku":"06-1780.FMF.FAC","brand":"FMF Exhausts","mpn":null,"gtin":null,"condition":"new","inStock":true,"stock":5,"price":{"amount":517.87,"formatted":"£517.87"},"summary":"The FMF Factory 4.1 RCT Stainless Slip-On with Carbon End Cap integrates FMF Resonance Chamber Technology™ for superior power across the RPM range. Its compact design is engineered for durability, with Factory Forward Engineering centralising mass for enhanced handling. Meticulously manufactured in Southern California using aerospace-grade materials, this slip-on exhaust offers substantial weight savings and incorporates the Rapid Tuning System (RTS). Features include closed course use only, Resonance Chamber Technology™ internally and externally, Factory Forward Engineering for mass centralisation, construction from a proprietary alloy blend to FMF’s stringent aerospace standards, a natural aluminium finish with a carbon end cap, massive power gains, substantial weight reduction over stock systems (total weight: 4.3 lbs), RTS for easier adjustments, a screen-type spark arrestor insert, and a 94dB quiet insert. Item ID: 045594. Type: Slip-On. Configuration: Single. Construction: Aluminium. Finish: Natural. End Cap: Carbon. Spark Arrestor: Screen Insert (included). Quiet Insert: 94dB Insert (included). Weight: 4.3 lbs. Not for road use, closed course only.","attributes":[{"label":"General Product Group","value":"Exhaust Systems & Parts"},{"label":"General Product Type","value":"Silencer"},{"label":"Variant Id","value":"209383"}],"image":"https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/06-1780_2EFMF_2EFAC/27768fc95035a400.jpg","images":["https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/06-1780_2EFMF_2EFAC/27768fc95035a400.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/06-1780_2EFMF_2EFAC/edc239731bdd91fd.jpg","https://b69270dd6ab1.blob.upstash.io/oracle/oro2u/06-1780_2EFMF_2EFAC/43f28c09b5f89154.jpg"],"description":"The FMF Factory 4.1 RCT Stainless Slip-On with Carbon End Cap integrates FMF Resonance Chamber Technology™ for superior power across the RPM range. Its compact design is engineered for durability, with Factory Forward Engineering centralising mass for enhanced handling. Meticulously manufactured in Southern California using aerospace-grade materials, this slip-on exhaust offers substantial weight savings and incorporates the Rapid Tuning System (RTS). Features include closed course use only, Resonance Chamber Technology™ internally and externally, Factory Forward Engineering for mass centralisation, construction from a proprietary alloy blend to FMF’s stringent aerospace standards, a natural aluminium finish with a carbon end cap, massive power gains, substantial weight reduction over stock systems (total weight: 4.3 lbs), RTS for easier adjustments, a screen-type spark arrestor insert, and a 94dB quiet insert. Item ID: 045594. Type: Slip-On. Configuration: Single. Construction: Aluminium. Finish: Natural. End Cap: Carbon. Spark Arrestor: Screen Insert (included). Quiet Insert: 94dB Insert (included). Weight: 4.3 lbs. Not for road use, closed course only.","descriptionMarkdown":"### FMF Factory 4.1 RCT Slip-On Exhaust Silencer with Carbon End Cap\n\nExperience enhanced performance and superior sound with the FMF Factory 4.1 RCT Slip-On Exhaust Silencer. This meticulously engineered exhaust system integrates FMF's advanced Resonance Chamber Technology™ both internally and externally, delivering significant power gains across the entire RPM range. Its compact design, combined with Factory Forward Engineering, centralizes mass for improved handling and reduces vulnerability to damage. Constructed from aerospace-grade materials in Southern California, this slip-on exhaust offers substantial weight savings and features the Rapid Tuning System (RTS) for easy adjustments.\n\n#### Key Features:\n\n \n- Closed course use only.\n \n- Features FMF Resonance Chamber Technology™ internally and externally for optimal performance.\n \n- Factory Forward Engineering positions the muffler closer to the motor for superior mass centralization.\n \n- Constructed from a proprietary alloy blend meeting FMF’s stringent aerospace standards.\n \n- Natural aluminium finish with a durable carbon fiber end cap.\n \n- Provides substantial power increases throughout the RPM range.\n \n- Offers significant weight reduction compared to stock exhaust systems.\n \n- Includes the Rapid Tuning System (RTS) for simplified tuning and adjustments.\n \n- Comes with a screen-type spark arrestor insert.\n \n- Includes a 94dB quiet insert for noise reduction.\n \n- 100% designed and manufactured in Southern California.\n\n#### Specifications:\n\n \n- Type: Slip-On\n \n- Configuration: Single\n \n- Construction Material: Aluminium\n \n- Finish: Natural\n \n- End Cap Material: Carbon\n \n- Included Accessories: Screen Insert Spark Arrestor, 94dB Quiet Insert\n \n- Weight: 4.3 lbs\n \n- Usage Restriction: Not for road use; designed for closed course competition only.","weightGrams":null,"fitments":[{"make":"HUSQVARNA","model":"FC 250","cc":null,"notes":null,"years":"2016–2018"},{"make":"HUSQVARNA","model":"FC 350","cc":null,"notes":null,"years":"2016–2018"},{"make":"HUSQVARNA","model":"FC 450","cc":null,"notes":null,"years":"2016–2018"},{"make":"HUSQVARNA","model":"FE 250","cc":null,"notes":null,"years":"2017–2019"},{"make":"HUSQVARNA","model":"FE 350","cc":null,"notes":null,"years":"2017–2019"},{"make":"HUSQVARNA","model":"FE 450","cc":null,"notes":null,"years":"2017–2019"},{"make":"HUSQVARNA","model":"FE 501","cc":null,"notes":null,"years":"2017–2019"},{"make":"HUSQVARNA","model":"FX 350","cc":null,"notes":null,"years":"2017–2018"},{"make":"HUSQVARNA","model":"FX 450","cc":null,"notes":null,"years":"2017–2018"},{"make":"KTM","model":"250 EXC-F","cc":null,"notes":null,"years":"2017–2019"},{"make":"KTM","model":"250 SX F FACTORY EDITION","cc":null,"notes":null,"years":"2015–2017"},{"make":"KTM","model":"250 SX-F","cc":null,"notes":null,"years":"2015–2018"},{"make":"KTM","model":"250 SX-F Factory Edition","cc":null,"notes":null,"years":"2015"},{"make":"KTM","model":"250 SX-F FACTORY EDITION","cc":null,"notes":null,"years":"2016–2017"},{"make":"KTM","model":"250 XC-F","cc":null,"notes":null,"years":"2016–2018"},{"make":"KTM","model":"350 EXC-F","cc":null,"notes":null,"years":"2017–2019"},{"make":"KTM","model":"350 SX-F","cc":null,"notes":null,"years":"2016–2018"},{"make":"KTM","model":"350 XC-F","cc":null,"notes":null,"years":"2016–2018"},{"make":"KTM","model":"450 EXC-F","cc":null,"notes":null,"years":"2018–2019"},{"make":"KTM","model":"450 EXC-F SIX DAYS","cc":null,"notes":null,"years":"2017–2019"},{"make":"KTM","model":"450 SX F FACTORY EDITION","cc":null,"notes":null,"years":"2015–2017"},{"make":"KTM","model":"450 SX-F","cc":null,"notes":null,"years":"2015–2018"},{"make":"KTM","model":"450 SX-F Factory Edition","cc":null,"notes":null,"years":"2015"},{"make":"KTM","model":"450 SX-F FACTORY EDITION","cc":null,"notes":null,"years":"2016–2017"},{"make":"KTM","model":"450 XC-F","cc":null,"notes":null,"years":"2016–2018"},{"make":"KTM","model":"500 EXC-F","cc":null,"notes":null,"years":"2017–2019"}],"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-slip-on-exhaust-silencer-15-19-ktm-husqvarna-250-350-450-500-501-","buyOneNow":"https://www.2brosparts.com/api/agent/checkout/GB/15ce693a7c31:1","basketWithThis":"https://www.2brosparts.com/api/agent/basket/GB/15ce693a7c31:1"}},"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. 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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."]}}