{"product_id":"arrow-71670mi","title":"Arrow Stainless Steel Header Yamaha YZF-R6 RJ27 (2017-2026) 71670MI","description":"\u003cp\u003eEngineered exclusively for track use, the Arrow 71670MI stainless steel header is a race-homologated exhaust component developed specifically for the Yamaha YZF-R6 RJ27 across the 2017–2026 model range. Purpose-built to sharpen throttle response and unlock meaningful power gains, it represents the first critical step in a full Arrow exhaust system upgrade for serious circuit riders.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRace-use certification: designed, tested and approved exclusively for closed-circuit competition — not road legal.\u003c\/li\u003e\n\u003cli\u003eHigh-grade stainless steel construction delivers outstanding heat resistance and durability across prolonged track sessions.\u003c\/li\u003e\n\u003cli\u003eOptimised header geometry sharpens throttle response and improves overall engine performance throughout the rev range.\u003c\/li\u003e\n\u003cli\u003e45 mm outlet diameter engineered for compatibility with Arrow mid-pipes and slip-on silencers in the YZF-R6 system.\u003c\/li\u003e\n\u003cli\u003ePrecise fitment for the Yamaha YZF-R6 RJ27 eliminates the fitment compromises of universal alternatives.\u003c\/li\u003e\n\u003cli\u003eECU remapping recommended to extract the full performance benefit and protect long-term engine reliability.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eBuilt for the Circuit\u003c\/h2\u003e\u003cp\u003eArrow's motorsport heritage runs deep, and the 71670MI header reflects that pedigree. The stainless steel construction handles the extreme thermal cycles of sustained track use without warping or cracking, while the carefully developed pipe routing optimises exhaust scavenging for the R6's high-revving inline-four. At 3.82 kg the header contributes to a leaner overall exhaust package compared to the stock system, freeing the engine to breathe and respond with greater immediacy.\u003c\/p\u003e\u003ch2\u003ePerformance \u0026amp; Setup Notes\u003c\/h2\u003e\u003cp\u003eTo realise the full potential of this header, Arrow strongly recommends a purpose-developed ECU remap. Running a modified exhaust system without updated fuelling can leave measurable performance on the table and, over time, affect engine longevity. Whether you are running a dedicated track-day machine or a full race build, pairing the 71670MI with appropriate mapping is the professional approach to the installation.\u003c\/p\u003e\u003ch2\u003eFitment \u0026amp; Compatibility\u003c\/h2\u003e\u003cp\u003eThis header fits the following model exclusively:\u003c\/p\u003e\u003cul\u003e\u003cli\u003eYamaha YZF-R6 RJ27 — model years 2017 to 2026\u003c\/li\u003e\u003c\/ul\u003e\u003cp\u003eRace use only. This component carries no road-use type approval and must not be fitted to any vehicle used on public roads.\u003c\/p\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eArrow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePart Number\u003c\/th\u003e\n\u003ctd\u003e71670MI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eComponent Type\u003c\/th\u003e\n\u003ctd\u003eHeader\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutlet Diameter\u003c\/th\u003e\n\u003ctd\u003e45 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e3.82 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFitment\u003c\/th\u003e\n\u003ctd\u003eYamaha YZF-R6 RJ27 (2017–2026)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eIntended Use\u003c\/th\u003e\n\u003ctd\u003eRace use only — not road legal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"Arrow","offers":[{"title":"Default Title","offer_id":53168808493322,"sku":"71670MI","price":952.0,"currency_code":"EUR","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7831\/0410\/files\/71670MI.png?v=1780816056","url":"https:\/\/inter-pace.com\/ar-bh\/products\/arrow-71670mi","provider":"Inter-Pace","version":"1.0","type":"link"}