Arrow 71689MI Stainless Steel Racing Mid-Pipe – Benelli TRK 502 (2017-2020)

The Arrow 71689MI racing central link pipe is the stainless steel connecting pipe, without catalytic converter, that Arrow provides for the 2017-2020 Benelli TRK 502 Euro 4 to mount the Race-Tech silencer. It is the lighter and freer version of the two: it weighs 0.65 kg compared to the one kilo of its catalytic twin. Not street legal, intended for track use. Product code 71689MI.

✓ Strengths

• Free pipe – instead of the catalytic link pipe there is a simple pipe: in the Arrow diagram it is the racing link pipe, as opposed to the approved catalytic link pipe 71689KZ.
• 350 grams less – 0.65 kg vs 1 kg for the 71689KZ: it is half the weight of the system.
• Catalogue coupling measurements – inlet ø 43 mm, outlet ø 54 mm, exactly the inlet of the Race-Tech silencer for this motorcycle.
• Stainless steel – material declared by the manufacturer.
• Costs a quarter of the catalytic converter – it is the cheapest way to complete the Arrow system on a track 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 listed in the catalog

• 71878AKN – Race-Tech "Dark" aluminium silencer with carbon end cap, ECE approved
• 71689KZ – the same central link pipe in catalytic and approved version, 1 kg
• 71878AK – the Race-Tech natural aluminium silencer, which Arrow has discontinued

Who is it perfect for?

For those who use the TRK 502 on the track or off-road in closed-to-traffic areas and want to free up the exhaust system for the minimum cost: it costs a quarter of the catalytic link pipe, weighs 350 grams less, and allows mounting the Arrow Race-Tech silencer. Those who keep the motorcycle registered and on the road must choose the 71689KZ.

Frequently asked questions

What exactly is the 71689MI?
It is the central pipe of the exhaust system, between the headers and the silencer. The 71689MI is the racing version: a free pipe, without a catalytic converter, made of stainless steel. It weighs 0.65 kg and is used to mount the Arrow Race-Tech silencer on the Benelli TRK 502 2017-2020.

Can I use it on the road?
No. Without a catalytic converter, the system is no longer compliant: it cannot be used on public roads or pass inspections. If the motorcycle is registered and you use it on the road, the correct code is the 71689KZ, catalytic and approved.

What is the difference between it and the 71689KZ?
Same function, same material, and same inlet and outlet diameters. The 71689KZ contains the catalytic converter, is approved, and weighs 1 kg; the 71689MI is the racing version, without catalytic converter, weighs 0.65 kg, and costs much less.

Does the package also include the silencer?
No. This code is only for the central link pipe. The silencer is a separate purchase: for the TRK 502, the intended Arrow silencer is the 71878AKN Race-Tech in "Dark" aluminium with a carbon fiber end cap.

What are the coupling measurements?
The manufacturer declares an inlet diameter of 43 mm and an outlet diameter of 54 mm. The 54 mm is exactly the inlet diameter of the Race-Tech silencer for the TRK 502: the two parts are designed to couple.

Is it suitable for my TRK 502 X?
No. This code is dedicated to the TRK 502 Euro 4 from 2017-2020, Arrow vehicle type P16. For the TRK 502 X and for subsequent model years, the Arrow catalog provides different codes: check your model and year before ordering.