Arrow 72612AK Maxi Race-Tech Aluminium Silencer – BMW F 650 GS and F 800 GS 2008-2018

The Arrow 72612AK terminal is a slip-on from the Maxi Race-Tech line with a body made of natural aluminum, a carbon end cap, and an internal stainless steel silencer, designed for the BMW F 650 GS and F 800 GS / Adventure. It is homologated, mounts on original headers with the included connector, weighs 2.9 kg, and comes with a dB-killer. Product code 72612AK.

✓ Strengths

• Mounts on the standard system – on all three Arrow model pages, this code is classified among the terminals for original headers: no need to modify the headers.
• Connector included – the Arrow technical sheet lists the connector material: stainless steel among the product materials.
• Homologated – on the official Arrow diagrams, the 72612AK falls under the homologation mark: it can be used on the road and passes inspections.
• Carbon end cap on natural aluminum – the light finish of the Maxi Race-Tech line, with a contrasting dark end cap.
• Covers three generations – F 650 GS 2008-2012, F 800 GS / Adventure 2008-2016 and 2017-2018.
• dB-killer included – the noise reducer is provided.

Technical specifications

Vehicle compatibility

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

Performance declared by Arrow

These are the values published by Arrow on the pages of the two models. Arrow indicates two distinct weights: 2.9 kg is the product weight in the 72612AK technical sheet, 2.79 kg is the weight of the Arrow system in the performance panel, compared to 4.80 kg for the standard system. For the F 800 GS / Adventure 2017-2018, Arrow does not publish dyno data.

Arrow also publishes two Dynojet graphs. On the F 800 GS graph, the maximum power goes from 81.01 HP with the original exhaust to 83.83 HP with only the Arrow terminal, and reaches 85.15 HP with the complete kit (terminal plus racing headers). On the F 650 GS graph, where Arrow does not provide headers, it goes from 69.70 HP to 70.16 HP with the terminal. These are the two curves you can find among the photos on the product page.

Who it's perfect for

For those who have a BMW F 650 GS or F 800 GS, including the Adventure version, and want to remove the original silencer without modifying the system and without breaking the law. It's a terminal that mounts on the standard headers, comes with its own stainless steel connector and dB-killer, and bears the homologation mark on Arrow diagrams. The 400 mm natural aluminum body with a carbon end cap is the light finish of the Maxi Race-Tech line: those who prefer black can find the same terminal in the 72612AKN.

Frequently Asked Questions

Is the Arrow 72612AK homologated?
Yes. On the official Arrow diagrams for the F 650 GS and F 800 GS / Adventure, the 72612AK appears under the homologation mark, and it is the code Arrow calls Maxi Race-Tech Approved. It can be used on the road with the dB-killer in place.

Do I need to change the headers too?
No. On all three Arrow model pages, this terminal is classified among the terminals for original headers, and the connecting pipe is already included: it mounts on the standard system without further purchases.

Which BMW models does it fit?
It fits the F 650 GS from 2008 to 2012 and the F 800 GS, also in Adventure version, for both the 2008-2016 and 2017-2018 series. Arrow identifies the first two with vehicle type E8GS, and the third with 4G80.

What is the difference with the 72612AKN?
The body finish changes: the 72612AK is in natural aluminum, the 72612AKN in "Dark" aluminum, meaning painted dark. The Maxi Race-Tech line, carbon end cap, and position on Arrow diagrams are the same for both.

What are its measurements and weight?
Arrow declares a 400 mm long body, with an inlet diameter of 54 mm and an outlet of 50 mm. The product weight on the technical sheet is 2.9 kg; in the performance panel, Arrow indicates a system weight of 2.79 kg compared to 4.80 kg for the standard system. Mounting to the frame is done with a steel clamp. There is no provision for a lambda sensor or a CO sensor.

How much does it differ from the original?
On the F 800 GS / Adventure 2008-2016, Arrow declares 82.5 HP and 77.86 Nm compared to the 79.50 HP and 74.63 Nm of the standard system; on the F 650 GS, 68 HP and 73.84 Nm compared to 67 HP and 71.59 Nm. In both cases, the system weight decreases from 4.80 to 2.79 kg and static noise increases by 2 dB. On the F 800 GS Dynojet graph, the terminal alone increases maximum power from 81.01 to 83.83 HP.