Arrow 71805MI Non-Catalytic Mid-Pipe Stainless Steel – Aprilia RSV 4 and Tuono V4 1100 (2025-2026)

The Arrow 71805MI non-catalytic central link pipe is the stainless steel connecting pipe that replaces the original catalytic link pipe on the 2025-2026 Aprilia RSV 4 and Tuono V4 1100 Euro 5+ models. It eliminates the catalytic converter, weighs 1.1 kg, and is interchangeable with the stock component. Not street legal, intended for track use. Product code 71805MI.

✓ Strengths

• Removes the catalytic converter – it's a de-cat pipe: a free pipe replaces the original catalytic converter.
• The most accessible version – same link pipe as the 71806MI in titanium, but in stainless steel: same function at a lower price, with 350 grams more.
• Interchangeable with original – the Arrow scheme marks all components as interchangeable with stock ones: it can also be mounted while retaining the original muffler.
• Lambda sensor provision – the connection for the lambda sensor is provided on the link pipe; there is no provision for the CO sensor.
• Complements Pista silencers – this is the link pipe provided by Arrow along with the 71003PT, 71003PTN, and 71004PT silencers for this bike.

Technical features

Vehicle compatibility

The list is taken from the official Arrow spare parts catalog. Always check your motorcycle's model and year before ordering.

Products available in the catalog

• 71806MI – the same non-catalytic central link pipe, in titanium (0.75 kg)
• 71003PT · 71003PTN · 71004PT – the Pista silencers provided for this motorcycle
• 11001EM – A.R.D. (Alert Remover Device), the Arrow electronic device provided for the Tuono V4 1100 2025-2026

Perfect for whom

For those who take a 2025-2026 RSV 4 or Tuono V4 1100 to the track and want to free up the exhaust from the catalytic converter without spending as much as titanium costs: the link pipe mounts in place of the original, can be combined with an Arrow Pista silencer or kept with the stock muffler, and the stainless steel withstands heat and track miles well.

Frequently asked questions

What exactly is the 71805MI link pipe?
It is the central pipe that connects the headers to the silencer. The 71805MI replaces the original on the RSV 4 and Tuono V4 1100 2025-2026, eliminating the catalytic converter: the exhaust gas flows through a free pipe instead of the converter. It is made of stainless steel and weighs 1.1 kg.

What is the difference with the 71806MI?
It is the same non-catalytic central link pipe, with the same shape and function: only the material changes. The 71805MI is made of stainless steel and weighs 1.1 kg, the 71806MI is made of titanium and weighs 0.75 kg. This is a 350-gram difference, at a significantly higher cost for titanium.

Can I use it on the road?
No. The 71805MI is a non-homologated racing component: it eliminates the catalytic converter and therefore cannot be used on public roads or pass inspections. It is intended exclusively for track or competition use, on bikes reserved for that purpose.

Do I also need to change the silencer?
No. On the Arrow assembly diagram, all components are marked as interchangeable with the original ones: the link pipe can be mounted while retaining the stock silencer. If you want to complete the system, the Pista silencers provided for this bike are 71003PT, 71003PTN, and 71004PT.

Will the "engine fault" message appear on the dashboard?
It can happen. These Aprilia models have dual lambda sensors and Arrow warns that installing a central link pipe may trigger an error warning on the dashboard. For the Tuono V4 1100 2025-2026, the Arrow catalog offers the A.R.D. 11001EM electronic device.

Is it necessary to intervene on the exhaust valve?
Yes. On the assembly diagram, Arrow states that when installing one of its link pipes, it is necessary to deactivate the exhaust valve control. This is a modification to the engine's electronic management: it must be performed by qualified personnel, along with the installation of the link pipe.