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Arrow Racing Mid-Pipe Stainless Steel Yamaha YZF-R1/M RN49 RN65 (2017-2026) 71672MI

CHF 410.41

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Engineered exclusively for the Yamaha YZF-R1 and YZF-R1M (RN49/RN65, 2017–2026), the Arrow Racing mid-pipe 71672MI is built from premium stainless steel to deliver the kind of thermal resilience and structural integrity that serious track use demands. It bridges the original header to either the stock silencer or an Arrow slip-on series — such as the 71829 — giving you a precisely engineered exhaust path without compromise.

Key Features

  • Heavy-gauge stainless steel construction resists heat fatigue and corrosion across extended track sessions
  • Designed to retain the original Arrow or OEM header, reducing upgrade cost and installation complexity
  • Compatible with Arrow slip-on series 71829 to complete a high-performance race system
  • Outlet diameter of 55 mm and inlet diameter of 53 mm ensure a precision gas-tight fit
  • Weighing just 1.43 kg, it contributes to a measurable reduction in unsprung exhaust mass
  • Optimised internal geometry sharpens throttle response and supports improved power delivery across the rev range

Build Quality and Materials

Arrow's reputation is built on manufacturing integrity, and the 71672MI reflects that at every weld. The stainless steel used throughout this mid-pipe is selected for its ability to withstand the extreme and sustained temperatures generated by a high-revving R1 engine under race conditions. Unlike titanium alternatives, stainless steel provides a balance of rigidity, workability and longevity that suits riders who push their machine at every circuit outing. The precise connection diameters — 53 mm at the inlet and 55 mm at the outlet — are machined to Arrow's exacting tolerances, eliminating the flex-joint leaks that compromise both performance and durability on lesser components.

Performance and Track Use

The mid-pipe's internal flow path is developed to complement the crossplane R1's firing order and exhaust pulse characteristics. By removing flow restrictions inherent in the OEM mid section, throttle pick-up from corner apex to exit becomes more direct, and the engine's mid-range delivery gains definition. Arrow recommends an ECU remap to extract the full performance benefit and to ensure fuelling remains accurate across the modified exhaust system's flow range — a step that also protects engine longevity at race pace.

Fitment and Compatibility

This mid-pipe is a direct-fit replacement for the following models:

  • Yamaha YZF-R1 RN49 (2017–2020)
  • Yamaha YZF-R1M RN49 (2017–2020)
  • Yamaha YZF-R1 RN65 (2021–2026)
  • Yamaha YZF-R1M RN65 (2021–2026)

It pairs with the original OEM header and accepts Arrow slip-on silencers from the 71829 series. An ECU remap is strongly recommended after fitment.

Important Notice

The Arrow Racing mid-pipe 71672MI is approved for race use only. It is not homologated for road use and must not be fitted to any motorcycle used on public roads.

Specifications

  • Part number: 71672MI
  • Material: stainless steel
  • Weight: 1.43 kg
  • Inlet diameter: 53 mm
  • Outlet diameter: 55 mm
  • Fitment: Yamaha YZF-R1/M RN49 RN65 (2017–2026)
  • Use: race use only — not road legal
  • Compatible silencer series: Arrow 71829
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