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Arrow Stainless Steel Header Yamaha YZF-R3 (2019-2020) 71639MI

€418,88

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  • 14-day returns — in stock ships within 24h
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We ship with DHL and FedEx — express on request. If an item is in stock, express delivery can often go out within 1 business day. Standard delivery takes about 2–5 business days domestically and usually around a week worldwide. Please check the available shipping options and delivery times in your cart, as we offer several carriers depending on the country.

Returns must be registered in advance by email and are possible in line with our cancellation policy (14-day return request + 14-day return window after approval). Please note: unregistered returns are not accepted. You'll find all details on conditions, exceptions and refunds in our cancellation policy.

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Engineered exclusively for circuit competition, the Arrow 71639MI stainless steel header transforms the Yamaha YZF-R3 into a sharper, more responsive track weapon. Developed to unlock genuine performance gains on the YZF-R3, this header rewrites the throttle response curve and frees up power that the stock exhaust system simply chokes off.

Key Features

  • Race-derived stainless steel construction delivers outstanding heat resistance and longevity under sustained high-rpm use
  • 45 mm outlet diameter optimised to match Arrow's exhaust flow targets for the YZF-R3 engine
  • Measurably improved throttle response and mid-to-top-end power delivery compared to the original header
  • Weighing 1.92 kg, the header keeps unsprung and rotating mass in check for a crisper handling feel
  • Designed exclusively for race use — no noise or emissions restrictions, purely focused on outright performance
  • Pairs exclusively with the Arrow Slip-On Series 71894 for a complete, performance-matched exhaust system

Performance on Track

The 71639MI header was designed from the outset as a track-only component. The stainless steel pipework sustains heat cycles that would degrade lesser materials, and the carefully engineered bore and bend geometry keep exhaust gas velocity exactly where it needs to be throughout the rev range. The result is a noticeably crisper pick-up from corner exit and stronger pull all the way to the limiter — exactly what R3 Cup competitors and trackday riders demand.

Important: Slip-On Compatibility

Fitting this header means the original OEM slip-on silencer can no longer be used. The 71639MI is engineered to mate directly with the Arrow Slip-On Series (part number 71894). Using any other silencer will compromise both performance and fitment integrity. For maximum power gains and long-term reliability, an ECU remap or updated mapping is strongly recommended after installation.

Fitment & Compatibility

This header fits the following motorcycle:

  • Yamaha YZF-R3 — model years 2019 and 2020

Race use only. Not road-legal. Not compatible with the original OEM silencer. Must be used with Arrow Slip-On Series 71894.

Specifications

  • Part number: 71639MI
  • Material: stainless steel
  • Outlet diameter: 45 mm
  • Weight: 1.92 kg
  • Use: race only (no road homologation)
  • Compatible silencer: Arrow Slip-On Series 71894
  • Fitment: Yamaha YZF-R3 2019-2020
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