{"product_id":"arrow-71777mi-collettori-racing-dekat-inox-bmw-f-750-gs-f-850-gs","title":"Arrow 71777MI Stainless Steel Racing De-cat Headers – BMW F 750 GS and F 850 GS 2021-2024","description":"\u003cdiv style=\"font-family:'Segoe UI',Arial,sans-serif;max-width:900px;margin:0 auto;color:#222;line-height:1.7;\"\u003e\n\n  \u003cp style=\"font-size:16px;\"\u003eThe \u003cstrong\u003eArrow 71777MI racing headers\u003c\/strong\u003e replace the original header assembly on the \u003cstrong\u003eBMW F 750 GS\u003c\/strong\u003e and \u003cstrong\u003eF 850 GS 2021-2024\u003c\/strong\u003e (Arrow vehicle type \u003cstrong\u003eMG85\u003c\/strong\u003e, Euro 5). They are made of \u003cstrong\u003estainless steel\u003c\/strong\u003e, \u003cstrong\u003eremove the catalytic converter\u003c\/strong\u003e, retain the \u003cstrong\u003elambda sensor housing\u003c\/strong\u003e, and weigh \u003cstrong\u003e1.82 kg\u003c\/strong\u003e. The \u003cstrong\u003e50 mm\u003c\/strong\u003e outlet connects directly to the Arrow 71776MI mid-pipe. Part number \u003cstrong\u003e71777MI\u003c\/strong\u003e, EAN 8019799122505.\u003c\/p\u003e\n\n\n  \u003cdiv style=\"background:#fff3cd;border-left:4px solid #ffc107;padding:16px;margin:20px 0;border-radius:4px;\"\u003e\n\n    \u003cstrong\u003e⚠️ RACING product: not homologated, closed-course only\u003c\/strong\u003e\u003cbr\u003e\n    On the official Arrow pages for \u003cstrong\u003eboth\u003c\/strong\u003e models, this code is marked as \u003cstrong\u003eRacing\u003c\/strong\u003e, which in the manufacturer's legend means: \u003cem\u003e\"does not comply with any regulations, not approved for road use, usable only on closed circuits\"\u003c\/em\u003e. By removing the catalytic converter, with these headers installed, \u003cstrong\u003ethe motorcycle is not road legal nor compliant for inspection\u003c\/strong\u003e. To remain compliant, only the muffler should be replaced with an ECE-marked Arrow one.\n  \u003c\/div\u003e\n\n\n  \u003ch3 style=\"color:#1a1a1a;border-bottom:2px solid #e63946;padding-bottom:6px;\"\u003e✓ Strengths\u003c\/h3\u003e\n\n  \u003cul style=\"font-size:15px;\"\u003e\n\n    \u003cli\u003e\n\n\u003cstrong\u003eRemoves the catalytic converter\u003c\/strong\u003e – eliminates the most restrictive element of the stock system, freeing up exhaust gas flow\u003c\/li\u003e\n\n    \u003cli\u003e\n\n\u003cstrong\u003eStainless steel\u003c\/strong\u003e – resists corrosion and high temperatures in the hottest part of the system\u003c\/li\u003e\n\n    \u003cli\u003e\n\n\u003cstrong\u003eLambda sensor housing retained\u003c\/strong\u003e – the original sensor can be reinstalled in its place, no blind attachment remains\u003c\/li\u003e\n\n    \u003cli\u003e\n\n\u003cstrong\u003e1.82 kg\u003c\/strong\u003e – weight declared by Arrow for the complete assembly\u003c\/li\u003e\n\n    \u003cli\u003e\n\n\u003cstrong\u003e50 mm outlet\u003c\/strong\u003e – the same measurement as the Arrow 71776MI mid-pipe connection: the two pieces connect without adapters\u003c\/li\u003e\n\n    \u003cli\u003e\n\n\u003cstrong\u003eInterchangeable with original parts\u003c\/strong\u003e – can also be installed while keeping the stock muffler\u003c\/li\u003e\n\n    \u003cli\u003e\n\n\u003cstrong\u003eDual application\u003c\/strong\u003e – the same code applies to F 750 GS and F 850 GS 2021-2024\u003c\/li\u003e\n\n  \u003c\/ul\u003e\n\n\n  \u003ch3 style=\"color:#1a1a1a;border-bottom:2px solid #e63946;padding-bottom:6px;\"\u003eTechnical specifications\u003c\/h3\u003e\n\n  \u003cp style=\"font-size:13px;color:#666;margin-top:-6px;\"\u003eData from the official Arrow SPECIFICATIONS sheet for code 71777MI.\u003c\/p\u003e\n\n  \u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;\"\u003e\n\n    \u003ctr style=\"background:#f5f5f5;\"\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eArrow Special Parts\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003ePart number (MPN)\u003c\/strong\u003e\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e71777MI\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n    \u003ctr style=\"background:#f5f5f5;\"\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eEAN\u003c\/strong\u003e\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e8019799122505\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eOfficial name\u003c\/strong\u003e\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eRacing headers interchangeable with original\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n    \u003ctr style=\"background:#f5f5f5;\"\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eHeader material\u003c\/strong\u003e\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eStainless steel\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eCatalytic converter\u003c\/strong\u003e\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eRemoved (decat configuration)\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n    \u003ctr style=\"background:#f5f5f5;\"\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eOutlet diameter\u003c\/strong\u003e\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e50 mm\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eLambda sensor housing\u003c\/strong\u003e\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eYes\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n    \u003ctr style=\"background:#f5f5f5;\"\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eCO sensor housing\u003c\/strong\u003e\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eNo\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eDb-killer\u003c\/strong\u003e\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eNot applicable\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n    \u003ctr style=\"background:#f5f5f5;\"\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e1.82 kg\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eHomologation\u003c\/strong\u003e\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eNone – marked Racing by Arrow, closed-course only\u003c\/strong\u003e\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n    \u003ctr style=\"background:#f5f5f5;\"\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eArrow Vehicle type\u003c\/strong\u003e\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eMG85\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003ePosition on vehicle\u003c\/strong\u003e\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eFront – between cylinder head and mid-pipe\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n    \u003ctr style=\"background:#f5f5f5;\"\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eItaly\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n  \u003c\/table\u003e\n\n  \u003cp style=\"font-size:13px;color:#666;\"\u003eArrow publishes \u003cstrong\u003e0.00\u003c\/strong\u003e for body length and inlet diameter: these are uncompiled values, not real measurements, and therefore we do not report them.\u003c\/p\u003e\n\n\n  \u003ch3 style=\"color:#1a1a1a;border-bottom:2px solid #e63946;padding-bottom:6px;\"\u003eVehicle compatibility\u003c\/h3\u003e\n\n  \u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;\"\u003e\n\n    \u003ctr style=\"background:#e63946;color:#fff;\"\u003e\n\n\u003cth style=\"padding:8px;border:1px solid #ddd;\"\u003eMake\u003c\/th\u003e\n\n\u003cth style=\"padding:8px;border:1px solid #ddd;\"\u003eModel\u003c\/th\u003e\n\n\u003cth style=\"padding:8px;border:1px solid #ddd;\"\u003eYears\u003c\/th\u003e\n\n\u003cth style=\"padding:8px;border:1px solid #ddd;\"\u003eVehicle type\u003c\/th\u003e\n\n\n\u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eBMW\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\n\n\u003cstrong\u003eF 750 GS\u003c\/strong\u003e Euro 5\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e2021-2024\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eMG85\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n    \u003ctr style=\"background:#f5f5f5;\"\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eBMW\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e\n\n\u003cstrong\u003eF 850 GS\u003c\/strong\u003e Euro 5\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e2021-2024\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eMG85\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n  \u003c\/table\u003e\n\n  \u003cp style=\"font-size:15px;\"\u003eFor \u003cstrong\u003eF 800 GS and F 900 GS 2024-2026\u003c\/strong\u003e (vehicle type MG90), Arrow \u003cstrong\u003edoes not produce headers\u003c\/strong\u003e: on those motorcycles, the upstream part is only the mid-pipe. Always check model and year before purchasing.\u003c\/p\u003e\n\n\n  \u003ch3 style=\"color:#1a1a1a;border-bottom:2px solid #e63946;padding-bottom:6px;\"\u003eHow they fit into the system\u003c\/h3\u003e\n\n  \u003cp style=\"font-size:15px;\"\u003eThey are the \u003cstrong\u003efirst section of the system\u003c\/strong\u003e, connected to the cylinder head. Downstream, the \u003cstrong\u003eArrow 71776MI mid-pipe\u003c\/strong\u003e (also racing, 50 mm connection) and then the muffler are mounted. All Arrow components are interchangeable with original ones, so the headers can also be used with the \u003cstrong\u003estock muffler\u003c\/strong\u003e.\u003c\/p\u003e\n\n  \u003ctable style=\"width:100%;border-collapse:collapse;font-size:14px;\"\u003e\n\n    \u003ctr style=\"background:#e63946;color:#fff;\"\u003e\n\n\u003cth style=\"padding:8px;border:1px solid #ddd;\"\u003ePart\u003c\/th\u003e\n\n\u003cth style=\"padding:8px;border:1px solid #ddd;\"\u003eCode\u003c\/th\u003e\n\n\u003cth style=\"padding:8px;border:1px solid #ddd;\"\u003eHomologation\u003c\/th\u003e\n\n\n\u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eHeaders \u003cem\u003e(this item)\u003c\/em\u003e\n\n\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e71777MI\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e❌ Racing\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n    \u003ctr style=\"background:#f5f5f5;\"\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eMid-pipe\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e71776MI\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e❌ Racing\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n    \u003ctr\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003eMaxi Race-Tech \"Dark\" aluminum muffler\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e72639AKN\u003c\/td\u003e\n\n\u003ctd style=\"padding:8px;border:1px solid #ddd;\"\u003e✅ ECE\u003c\/td\u003e\n\n\n\u003c\/tr\u003e\n\n  \u003c\/table\u003e\n\n  \u003cp style=\"font-size:15px;\"\u003e🔑 The \u003cstrong\u003e72639AKN muffler alone\u003c\/strong\u003e is ECE homologated and keeps the motorcycle road legal. \u003cstrong\u003eAdding racing headers or mid-pipe makes the system usable only on closed circuits.\u003c\/strong\u003e\u003c\/p\u003e\n\n\n  \u003ch3 style=\"color:#1a1a1a;border-bottom:2px solid #e63946;padding-bottom:6px;\"\u003ePerfect for\u003c\/h3\u003e\n\n  \u003cp style=\"font-size:15px;\"\u003eFor those who take their F 750 or F 850 GS to the track or closed circuits and want to truly free up the system: the muffler alone changes the sound, but as long as the catalytic converter remains in place, that's the bottleneck. These headers remove that restriction and lighten the front of the system, while remaining mountable even with the original muffler. This is a part purchased with the understanding that the motorcycle, in this configuration, is not for road use.\u003c\/p\u003e\n\n\n  \u003cdiv style=\"background:#f0f7f0;border-left:4px solid #28a745;padding:14px;margin:20px 0;border-radius:4px;\"\u003e\n\n    \u003cstrong\u003e🛡️ Warranty and quality – Moon Bike S.r.l.\u003c\/strong\u003e\u003cbr\u003e\n    \u003cstrong\u003eOriginal Arrow Special Parts\u003c\/strong\u003e product, manufactured in Italy. Moon Bike S.r.l. is based in Cercola (NA): official manufacturer's 2-year warranty, direct assistance in Italian, and shipping throughout Italy and abroad with packaging suitable for the length of the part.\n  \u003c\/div\u003e\n\n\n  \u003ch3 style=\"color:#1a1a1a;border-bottom:2px solid #e63946;padding-bottom:6px;\"\u003eFrequently asked questions\u003c\/h3\u003e\n\n  \u003cp style=\"font-size:15px;\"\u003e\u003cstrong\u003eAre they road legal?\u003c\/strong\u003e\u003cbr\u003eNo. Arrow marks them \u003cstrong\u003eRacing\u003c\/strong\u003e on both model pages, and the official legend states that a Racing product does not comply with any regulations and should only be used on \u003cstrong\u003eclosed circuits\u003c\/strong\u003e. By removing the catalytic converter, the motorcycle is not legal for road use or inspection.\u003c\/p\u003e\n\n  \u003cp style=\"font-size:15px;\"\u003e\u003cstrong\u003eWhich BMWs do they fit?\u003c\/strong\u003e\u003cbr\u003eOn \u003cstrong\u003eF 750 GS\u003c\/strong\u003e and \u003cstrong\u003eF 850 GS\u003c\/strong\u003e from the \u003cstrong\u003e2021-2024\u003c\/strong\u003e series, which Arrow identifies with vehicle type \u003cstrong\u003eMG85\u003c\/strong\u003e. For F 800 GS and F 900 GS 2024-2026 (MG90), Arrow does not produce headers.\u003c\/p\u003e\n\n  \u003cp style=\"font-size:15px;\"\u003e\u003cstrong\u003eCan I install them while keeping the original muffler?\u003c\/strong\u003e\u003cbr\u003eYes. All Arrow components are \u003cstrong\u003einterchangeable with stock parts\u003c\/strong\u003e, so the headers can be combined with the original muffler or an Arrow muffler.\u003c\/p\u003e\n\n  \u003cp style=\"font-size:15px;\"\u003e\u003cstrong\u003eCan the lambda sensor be reinstalled?\u003c\/strong\u003e\u003cbr\u003eYes: Arrow states that the \u003cstrong\u003elambda sensor housing is present\u003c\/strong\u003e on the headers, so the original sensor will find its connection point. However, there is no housing for the CO sensor.\u003c\/p\u003e\n\n  \u003cp style=\"font-size:15px;\"\u003e\u003cstrong\u003eHow much do they weigh and what is their diameter?\u003c\/strong\u003e\u003cbr\u003e\u003cstrong\u003e1.82 kg\u003c\/strong\u003e and \u003cstrong\u003e50 mm\u003c\/strong\u003e outlet diameter, the same measurement as the 71776MI mid-pipe connection. Length and inlet diameter are not among the data published by Arrow, so we do not report them.\u003c\/p\u003e\n\n  \u003cp style=\"font-size:15px;\"\u003e\u003cstrong\u003eWhich muffler do they combine with?\u003c\/strong\u003e\u003cbr\u003eWith the \u003cstrong\u003eMaxi Race-Tech 72639AKN\u003c\/strong\u003e, via the \u003cstrong\u003e71776MI\u003c\/strong\u003e mid-pipe. Please note: the muffler alone is ECE homologated, but with racing headers and mid-pipe, the system becomes for track use.\u003c\/p\u003e\n\n  \u003cp style=\"font-size:15px;\"\u003e\u003cstrong\u003eIs it an original product?\u003c\/strong\u003e\u003cbr\u003eYes, \u003cstrong\u003eoriginal Arrow Special Parts\u003c\/strong\u003e spare part, code 71777MI, EAN 8019799122505.\u003c\/p\u003e\n\n\n\u003c\/div\u003e","brand":"Arrow","offers":[{"title":"Default Title","offer_id":57068775866716,"sku":"71777MI","price":417.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0966\/3660\/0668\/files\/arrow-71777mi-collettori-racing-inox-bmw-f-750-f-850-gs.png?v=1788373935","url":"https:\/\/www.moonbikesrl.it\/en-row\/products\/arrow-71777mi-collettori-racing-dekat-inox-bmw-f-750-gs-f-850-gs","provider":"Moon Bike S.r.l.","version":"1.0","type":"link"}