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

The Arrow 72612AK is the slip-on exhaust for the Maxi Race-Tech line with a natural aluminium body, carbon fibre end cap, and stainless steel silencer core, designed for the BMW F 650 GS and the F 800 GS / Adventure. It is homologated, fits onto the original headers with the adapter already included, weighs 2.9 kg, and comes with a db-killer. Product code 72612AK.

✓ Key Features

• Fits the standard exhaust system – for all three models, this code is among the exhausts for original headers: there is no need to modify the headers.
• Adapter included – made of stainless steel.
• Homologated – the 72612AK is homologated: it can be used on the road and will pass the MOT.
• Carbon fibre end cap on natural aluminium – 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 reduction device is included in the package.

Technical Specifications

Vehicle compatibility

Always check your bike's model and year before ordering.

Performance

These are the values for the two models. There are two distinct weights: 2.9 kg is the weight of the 72612AK product, 2.79 kg is the weight of the Arrow system in the performance comparison, compared to the 4.80 kg of the stock system. For the F 800 GS / Adventure 2017-2018, the dyno data is not available.

Among the photos, you will also find two Dynojet charts. On the F 800 GS chart, maximum power goes from 81.01 hp with the stock exhaust to 83.83 hp with the Arrow slip-on alone, and reaches 85.15 hp with the full kit (slip-on plus racing headers). On the F 650 GS chart, where Arrow does not offer headers, it goes from 69.70 hp to 70.16 hp with the slip-on.

Who is it perfect for

For anyone with a BMW F 650 GS or F 800 GS, including the Adventure version, who wants to remove the stock silencer without replacing the entire system and without breaking the law. It is a slip-on that fits onto the stock headers, comes with its own stainless steel adapter and db-killer, and carries the homologation marking. The 400 mm natural aluminium body with the carbon fibre end cap is the light finish of the Maxi Race-Tech line: those who prefer black will find the same exhaust in the 72612AKN.

Frequently Asked Questions

Is the Arrow 72612AK homologated?
Yes. On the F 650 GS and the F 800 GS / Adventure, the 72612AK is homologated, and it is the code called Maxi Race-Tech Approved. It can be used on the road by keeping the db-killer in place.

Do I also need to change the headers?
No. On all three models, this exhaust is among the exhausts for original headers, and the connection adapter is already included: it fits onto the stock system without any other purchases.

Which BMWs does it fit?
The F 650 GS from 2008 to 2012 and the F 800 GS, including the Adventure version, both in the 2008-2016 and 2017-2018 series. The first two have the E8GS vehicle type, the third has the 4G80.

What is the difference with the 72612AKN?
The body finish is different: the 72612AK is in natural aluminium, the 72612AKN in «Dark» aluminium, meaning dark painted. The Maxi Race-Tech line, carbon fibre end cap and mounting position are the same for both.

What are its dimensions and weight?
It has a 400 mm long body, with a 54 mm fitting diameter and a 50 mm outlet. The product weight is 2.9 kg; in the performance comparison, the system weighs 2.79 kg compared to the 4.80 kg of the stock system. It is attached to the frame with a steel clamp. There is no provision for either a lambda probe or a CO probe.

How much does it differ from the stock?
On the F 800 GS / Adventure 2008-2016, it reaches 82.5 hp and 77.86 Nm compared to the 79.50 hp and 74.63 Nm of the stock 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 drops from 4.80 to 2.79 kg and the static noise increases by 2 dB. On the F 800 GS Dynojet chart, the slip-on alone increases maximum power from 81.01 to 83.83 hp.