Arrow 73010MI Stainless Steel Racing Headers – BMW C 650 Sport (2016-2020)

The Arrow 73010MI collectors are the two-in-one racing exhaust manifold in stainless steel that replaces the standard collectors of the BMW C 650 Sport maxi-scooter from 2016 to 2020. They weigh 1.93 kg, have a 50 mm outlet and retain the provision for the lambda sensor. They are not homologated, but Arrow states that they also fit with the original muffler. Product code 73010MI.

✓ Strengths

• They also fit with the original muffler – this is what Arrow explicitly states in the assembly diagram, and for this bike it only concerns the collectors: you can start here without changing anything else.
• Declared stainless steel – the Arrow technical sheet states manifold material: stainless steel for the entire assembly.
• 1.93 kg – this is the weight published by Arrow for this code.
• Lambda sensor provision – on this bike, it is the only Arrow part of the system to have it: the original sensor fits on the collectors.
• 50 mm outlet – the same measurement as the 73009MI central link pipe connection: the two parts are designed to couple.
• Welded attachment – fastening to the frame is via a welded attachment on the body.

Technical specifications

Vehicle compatibility

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

How the Arrow system is composed

The measurements are those published by Arrow on the technical sheets of the individual codes and fit together.

Performance declared by Arrow

These are the values that Arrow publishes for the BMW C 650 Sport 2016-2020 and refer to the complete system, not just the collectors.

Products available from the catalog

• 73009KZ – the catalytic homologated central link pipe, the street choice
• 73009MI – the racing central link pipe, with a 50 mm inlet that matches these collectors
• 73512AKN – the Race-Tech "Dark" aluminum muffler with carbon end cap, ECE homologated

Who it's perfect for

For those who take their C 650 Sport to the track and want to upgrade the exhaust system starting from the front, where the flow gain is greatest. These are the only Arrow parts for this bike that, according to the manufacturer, can also be installed while keeping the stock muffler: so you can install them alone and complete the system later with the link pipe and muffler. They are made of stainless steel, weigh 1.93 kg, have a welded attachment and retain the lambda sensor port. They are not a street-legal part: on the Arrow diagram, they do not bear an homologation mark.

Frequently Asked Questions

Are the Arrow 73010MI collectors homologated?
No. On the official Arrow diagram for the BMW C 650 Sport 2016-2020, the 73010MI does not bear the homologation mark, which instead appears next to the catalytic link pipe 73009KZ. Therefore, these are racing collectors, intended for track use and not for circulation on public roads.

Can I install them while keeping the original muffler?
Yes. Arrow explicitly states this at the bottom of the model's assembly diagram: the 73010MI collectors also fit with the original muffler. For this bike, it is the only Arrow component with this note, and it is what allows you to start the system from the beginning.

What is needed for the complete Arrow system?
In addition to these collectors, a central link pipe and a muffler are needed. On the Arrow diagram, two link pipes are available: the 73009KZ catalytic homologated and the 73009MI racing, and the muffler is the Race-Tech 73512AKN in "Dark" aluminum with a carbon end cap.

What material and weight do they have?
The Arrow technical sheet declares manifold material: stainless steel and a weight of 1.93 kg for this code. Fastening to the frame is via a welded attachment on the manifold body.

Is there a provision for the lambda sensor?
Yes. Arrow declares provision for the lambda sensor on this code, while there is no provision for the CO sensor. On this bike, it is the only Arrow part of the system to have that fitting: link pipes and muffler do not.

Do the measurements match the other Arrow parts?
Yes. Arrow declares the collector outlet to be 50 mm, the 73009MI central link pipe with a 50 mm inlet and 60 mm outlet, and the 73512AKN muffler with a 60 mm inlet: the three parts fit into each other. The length and inlet diameter of the collectors are not declared.