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Arrow Stainless Steel Header KTM RC 390 (2022-2025) 71765MI

DA 65,800.00

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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 track and competition use, the Arrow 71765MI stainless steel header transforms the exhaust flow of the KTM RC 390 (2022–2025), delivering sharper throttle response and measurable power gains from the moment the engine comes on cam. This is the upgrade that takes a nimble single from street-ready to race-ready.

Key Features

  • Race-developed stainless steel construction for outstanding heat resistance and long-term durability under sustained high-load running
  • Optimised tube geometry engineered to improve throttle response and overall power output on the KTM RC 390
  • Weighs just 1.27 kg, contributing directly to a reduced unsprung mass and improved handling balance
  • Compatible with both the original KTM slip-on silencer and the Arrow Slip-On 71957 — maximum flexibility for your build
  • Purpose-built for race use: free from road-use compromises that limit aftermarket performance headers
  • ECU remapping recommended to unlock the full performance potential and ensure long-term reliability

Track Performance

The 71765MI header is a core component for any serious KTM RC 390 race build. Arrow's engineering team developed the pipe to extract peak performance from the 373 cc single-cylinder engine, prioritising mid-range sharpness and top-end flow. The result is a header that responds immediately to throttle inputs — exactly what a rider needs when braking late and picking up the drive hard out of a corner.

The stainless steel construction handles the repeated thermal cycling of track sessions without distortion or degradation, cycle after cycle. Paired with the Arrow Slip-On 71957, the entire exhaust system is fully matched and tuned as a unit, maximising the gains available from the combination.

Installation & Mapping

Fitting the 71765MI is a direct replacement of the OEM header. Arrow strongly recommends a dedicated ECU mapping session following installation — a custom map tailored to this header will unlock the full power and throttle response improvements while protecting the engine under racing conditions.

Fitment & Compatibility

This header fits the following motorcycle:

  • KTM RC 390 — model years 2022, 2023, 2024, 2025

Compatible silencer options:

  • Original KTM slip-on silencer
  • Arrow Slip-On, part number 71957

Important Notice

Race use only. This header does not carry road-use type approval and must not be used on public roads. It is intended solely for closed competition and track day use.

Specifications

  • Part Number: 71765MI
  • Brand: Arrow
  • Material: Stainless steel
  • Weight: 1.27 kg
  • Fitment: KTM RC 390 (2022–2025)
  • Compatible silencers: OEM KTM slip-on / Arrow Slip-On 71957
  • Use: Race use only — no road approval
  • ECU remapping: Recommended
More guides on Exhaust Headers →