Arrow Stainless Steel Header Yamaha YZF-R3 (2021-2026) 71639MI
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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 track and racing use, the Arrow 71639MI stainless steel header transforms the exhaust flow of the Yamaha YZF-R3 (2021-2026) for noticeably sharper throttle response and genuine performance gains where they matter most — on circuit.
Key Features
- Race-developed geometry optimised for improved throttle response and measurable power gains on the Yamaha YZF-R3
- Constructed from high-grade stainless steel for outstanding heat resistance and long-term durability under sustained racing conditions
- Outlet diameter of 45 mm matched precisely to the Arrow slip-on silencer range for a perfect seal and unrestricted flow
- Weighs just 1.92 kg, reducing unsprung and overall bike mass for improved handling and agility
- Designed and manufactured by Arrow, one of motorsport's most respected exhaust specialists
Build Quality & Performance
The 71639MI header is built to withstand the thermal and mechanical demands of repeated track sessions. Stainless steel construction resists corrosion, handles extreme exhaust temperatures without distortion, and maintains its structural integrity across a full racing season. The precision-formed tube geometry is developed to maximise scavenging efficiency, delivering a broader, more responsive power curve compared to the standard header.
To extract the full benefit of the Arrow header and protect the engine management system, a dedicated ECU remap is strongly recommended following installation.
Compatibility & Important Notes
This header is approved for race use only and carries no road homologation. It cannot be used with the original Yamaha slip-on silencer — a compatible Arrow slip-on from the 71831 series must be fitted to complete the exhaust system. Do not attempt to pair this header with any non-Arrow end can.
Fitment & Compatibility
- Yamaha YZF-R3, model years 2021, 2022, 2023, 2024, 2025, 2026
Specifications
| Attribute | Detail |
|---|---|
| Part number | 71639MI |
| Brand | Arrow |
| Material | Stainless steel |
| Weight | 1.92 kg |
| Outlet diameter | 45 mm |
| Compatible silencer | Arrow slip-on series 71831 |
| Approval | Race use only — not road legal |
| Fitment | Yamaha YZF-R3 (2021-2026) |
| Part number | 71639MI |
|---|---|
| Brand | Arrow |
| Material | Stainless steel |
| Weight | 1.92 kg |
| Outlet diameter | 45 mm |
| Compatible silencer | Arrow slip-on series 71831 |
| Approval | Race use only — not road legal |
| Fitment | Yamaha YZF-R3 (2021-2026) |
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