12 silencers for the BMW R 1200 GS in the test

Table of contents

12 silencers for the BMW R 1200 GS in the test
Lohse

12 silencers for the BMW R 1200 GS in the test

12 silencers for the BMW R 1200 GS in the test

12 silencers for the BMW R 1200 GS in the test

12 silencers for the BMW R 1200 GS in the test

41 pictures

12 silencers for the BMW R 1200 GS in the test
Lohse

1/41
3rd place: Hattech Dark Style
The Hattech muffler not only gives the GS a powerful sound, but also scores with a high-quality appearance.

12 silencers for the BMW R 1200 GS in the test
BILLION

2/41
The laser remains weak in terms of sound and performance.

12 silencers for the BMW R 1200 GS in the test
Lohse

3/41
Workmanship, fit and noise development are pleasing to the beautifully made BOS GP-2.

12 silencers for the BMW R 1200 GS in the test
BILLION

4/41
Only on the test bench does it stay lean.

12 silencers for the BMW R 1200 GS in the test
Lohse

5/41
The original damper therefore occupies eighth place. From the factory, the boxer scores with a cleanly processed silencer that allows dirt to accumulate quickly. Pleasant sound.

12 silencers for the BMW R 1200 GS in the test
BILLION

6/41
The performance of the original damper from the BMW factory.

12 silencers for the BMW R 1200 GS in the test
Lohse

7/41
7th place: SC Project SC-1
What a sound! The word silencer seems a bit out of place at SC-Project.

12 silencers for the BMW R 1200 GS in the test
BILLION

8/41
The finish is great, but whether the race management agrees mildly?

12 silencers for the BMW R 1200 GS in the test
Lohse

9/41
6th place: AC Schnitzer Stealth
Slim shaped bag with a very attractive finish. The exhaust of the BMW tuner goes well with the GS and sounds good.

12 silencers for the BMW R 1200 GS in the test
BILLION

10/41
No plus in performance.

12 silencers for the BMW R 1200 GS in the test
Lohse

11/41
5th place: Termignoni slip-on
The one-piece system scores with its excellent surface quality and wraps the boxer in a fat cloud of sound.

12 silencers for the BMW R 1200 GS in the test
BILLION

12/41
Deficit: the performance.

12 silencers for the BMW R 1200 GS in the test
Lohse

13/41
4th place: Zard Slip / on
The bag, which tapers to a point at the bottom, suits the GS exceptionally well and gives it a rich bass tone.

12 silencers for the BMW R 1200 GS in the test
BILLION

14/41
No plus in terms of performance.

12 silencers for the BMW R 1200 GS in the test
Lohse

15/41
The Laser Hotcam Dual Sound scores with its technically good appearance with a solid fit on the GS.

12 silencers for the BMW R 1200 GS in the test
BILLION

16/41
Unfortunately, the performance remains below the series.

12 silencers for the BMW R 1200 GS in the test
Lohse

17/41
Shark, Laser and BOS share the next places. The Shark Competition DSX-5 is an inexpensive rear silencer that looks good with the GS. The sound is too shrill for the boxer.

12 silencers for the BMW R 1200 GS in the test
Ems

18/41
MOTORRAD took a closer look at a total of 14 models.

12 silencers for the BMW R 1200 GS in the test
Frill

19/41
The connecting pipes of all silencers fit the standard manifold of the GS. Only with Hurric and Shark cannot the heat plate be mounted.

12 silencers for the BMW R 1200 GS in the test
Frill

20/41
Beautifully made details such as a heat plate specially made in the BMW GS look (Termignoni) are unfortunately only available from a few suppliers.

12 silencers for the BMW R 1200 GS in the test
Frill

21/41
Sharp-edged protrusions such as the screw that is too long for the clamp on the connecting pipe of the Arrow exhaust can cause injuries when cleaning.

12 silencers for the BMW R 1200 GS in the test
Frill

22/41
Since the mufflers should fit on many motorcycles, it can get very tight depending on the model type – as here with the indicator in the exhaust flow of the Arrow exhaust.

12 silencers for the BMW R 1200 GS in the test
Lohse

23/41
After paper form and labeling, all systems comply with the legally relevant driving noises. Even the original fails in the MOTORRAD test.

12 silencers for the BMW R 1200 GS in the test
Frill

24/41
Since accessory silencers work according to the absorption principle (with insulating wool), they are usually significantly lighter than the original (with sound chambers).

12 silencers for the BMW R 1200 GS in the test
Frill

25/41
The exhaust tuning is also fun, as almost every system can be installed within a few minutes. A screwdriver experience could hardly be more positive.

12 silencers for the BMW R 1200 GS in the test
BILLION

26/41
Well done, but not a highlight.

12 silencers for the BMW R 1200 GS in the test
Lohse

27/41
12th place: Arrow Race-Tech
The long stovepipe pleases with deep hum on low tours, there is a lack of volume upwards.

12 silencers for the BMW R 1200 GS in the test
BILLION

28/41
There is also a little lack of performance.

12 silencers for the BMW R 1200 GS in the test
Lohse

29/41
The 13th place went to the Hurric Short Rac1 silencer. The Hurric muffler is a bit rough and sounds a bit too obscene for the GS.

12 silencers for the BMW R 1200 GS in the test
BILLION

30/41
In return, however, far too much performance falls by the wayside.

12 silencers for the BMW R 1200 GS in the test
Lohse

31/41
Last place went to the GPR Furore Nero Italia silencer. The GPR damper looks cute and attracts with a low price.

12 silencers for the BMW R 1200 GS in the test
Lohse

32/41
The two operating modes are activated via a push button in the cockpit. Price is 1730 euros (brushed stainless steel).

12 silencers for the BMW R 1200 GS in the test
Lohse

33/41
Here the flap can be seen open.

12 silencers for the BMW R 1200 GS in the test
Lohse

34/41
Tough, but well done. The high-performance exhaust has a valve control. Here the flap is closed.

12 silencers for the BMW R 1200 GS in the test
Lohse

35/41
In a short test, the Kesstech High Performance was examined carefully.

12 silencers for the BMW R 1200 GS in the test
BILLION

36/41
The performance of the SR Racing R 1200 GS.

12 silencers for the BMW R 1200 GS in the test
Lohse

37/41
The SR Racing silencer emerged as the winner. The small exhaust manufacturer in Bavaria is and remains a guarantee for technically first-class systems. And the sound also fits the boxer.

12 silencers for the BMW R 1200 GS in the test
BILLION

38/41
The performance of the Akrapovic damper.

12 silencers for the BMW R 1200 GS in the test
Lohse

39/41
2nd place: Akrapovic slip-on
The one-piece exhaust made of feather-light titanium fits like a glove and gives the boxer an unmistakable sound. Expensive but great!

12 silencers for the BMW R 1200 GS in the test
BILLION

40/41
The performance of the Hattech damper.

12 silencers for the BMW R 1200 GS in the test
BILLION

41/41
The performance of the Kesstech High Performance.

accesories

12 silencers for the BMW R 1200 GS in the test

14 silencers for the BMW R 1200 GS in the test
Comparison test including videos on all end pots

Tschingderassabumm, who would have thought: Since 2010 the BMW R 1200 GS with air-cooled dohc boxer engine has been blowing the march thanks to the flap control in the exhaust duct. Which accessory exhaust can put a flourish on it?

Jorg Lohse

08/13/2013

You can literally feel the thieving grin when the BMW official takes a position on the function of the exhaust flap in the manifold outlet: “The exhaust flap, which is controlled by an electric servomotor and opening and closing cables, enables increased back pressure due to the variable passage cross-section in the lower to medium speed range with a small opening and thus more torque and pulling power, while the release of the full cross-section in the upper speed regions is conducive to maximum power, “explains BMW press spokesman Rudi Probst when asked by MOTORRAD. Sound. “

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12 silencers for the BMW R 1200 GS in the test

14 silencers for the BMW R 1200 GS in the test
Comparison test including videos on all end pots

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Noise development in the test zone must remain in the green area

Aha, now it’s out. The subject of “sound engineering”, previously widespread mainly on Italian and US motorcycles, is now also enjoying a high priority north of the Alps. Gone are the days when the boxers protteln well and honestly. With the dohc boxer engine, BMW R 1200 GS from model year 2010 onwards a lot of vocal power increased. Thanks to the flap just mentioned, which is supposed to provide quiet tones – when it matters. A look at the European regulation 97/24 / EG, which describes the permissible noise level of motorcycles in chapter 9. The driving noise, which is measured when accelerating from 50 km / h in second and third gear, is of particular legal relevance. 80 db (A) are permitted. What happens below or above is irrelevant. The main thing is that the noise level remains in the green area in the test zone. So cheers to the modern engine management, with which the opening angle of the flap can be adjusted to various parameters such as speed, engine load and gear selection.

Our measurements show how difficult it is to overcome this homologation hurdle: Even the original remains louder than permitted in terms of driving noise. For the suppliers of accessory exhaust systems, the air is getting thinner and thinner anyway. This is also shown by a look at the test bench curves of the 13 systems that compete with the original GS silencer. Very few manufacturers manage to squeeze anything more than the series performance out of the GS. For some, the power and torque curve is almost congruent with the original, some even rob the GS a little of its punch.

At best, they can score points for weight – savings of up to 60 percent are already possible compared to the original pot weighing more than five kilos.

BMW original


12 silencers for the BMW R 1200 GS in the test


Lohse

From the factory, the boxer scores with a cleanly processed silencer that allows dirt to accumulate quickly. Pleasant sound.

Weight: 5.1 kg
Power: 79.7 kW / 108 PS
Sound: grumpy, tinny+

providers
BMW motorcycle,
Telephone 089/125016200,
www.bmw-motorrad.de

materials stainless steel
price 637.89 euros
Weight 5.1 kg
Suitable from year of construction 2010
Country of Manufacture Poland
ECE approval mark 1 (Germany)
Coat versions not chrome-plated (521.42 euros)
design type Slip-on
Standing noise dB (A) * 91
Driving noise dB (A) ** 83

plus
insensitive surfaces; exact fit; good performance; solidly processed.

minus
high driving noise; high weight; awkward to maintain.


12 silencers for the BMW R 1200 GS in the test


BILLION

The performance of the original damper from the BMW factory.

Conclusion
From the factory, the boxer scores with a cleanly processed silencer that allows dirt to accumulate quickly. Pleasant sound.

MOTORRAD verdict: good

Placement: 8th place

AC Schnitzer Stealth


12 silencers for the BMW R 1200 GS in the test


Lohse

Slim shaped bag with a very attractive finish. The exhaust of the BMW tuner goes well with the GS and sounds good.

Weight: minus 29.4%
Performance: minus 0.4%
Sound: full, balanced

providers
Touratech,
Telephone 07728/92790,
www.touratech.de

materials

Stainless steel / carbon price 599 euros Weight 3.6 kg Suitable from year of construction 2005 Country of Manufacture Austria ECE approval mark 4 (Netherlands) Coat versions no design type Slip-on Standing noise dB (A) * 88 Driving noise dB (A) ** 83

plus
valuable processed; great fit, easy to assemble with firmly screwed holder.

minus
high driving noise; Performance below the series; scratch-sensitive surfaces.


12 silencers for the BMW R 1200 GS in the test


BILLION

Unfortunately no plus in terms of performance.

Conclusion
Slim shaped bag with a very attractive finish. The exhaust of the BMW tuner goes well with the GS and sounds good. No plus in terms of performance.

MOTORRAD verdict: good

Placement: 6th place

Akrapovic slip-on


12 silencers for the BMW R 1200 GS in the test


Lohse

The one-piece exhaust made of feather-light titanium fits like a glove and gives the boxer an unmistakable sound.

Weight: minus 54.9%
Performance: plus 0.1%
Sound: fat, bassy

providers
Jamparts vehicle technology,
Telephone 07150/970565,
www.jamparts.com

materials

Titanium / carbon price 967.94 euros Weight 2.3 kg Suitable from year of construction 2010 Country of Manufacture Slovenia ECE approval mark 24 (Ireland) Coat versions no design type Slip-on Standing noise dB (A) * 90 Driving noise dB (A) ** 83

plus
top processed with picture book welds; high quality material mix; full power development; easy.

minus
high driving noise.


12 silencers for the BMW R 1200 GS in the test


BILLION

The performance of the Akrapovic damper.

Conclusion
The one-piece exhaust made of feather-light titanium fits like a glove and gives the boxer an unmistakable sound. Expensive but great!

MOTORRAD verdict: very good

Placement: 2nd place

Arrow Race Tech


12 silencers for the BMW R 1200 GS in the test


Lohse

The long stovepipe pleases with deep hum on low tours, there is a lack of volume upwards.

Weight: minus 21.6%
Performance: minus 3.4%
Sound: powerful at the bottom, soft at the top

providers
Alpha technique,
Telephone 08036/300720,
www.alphatechnik.de 

materials

Stainless steel / aluminum / carbon price 551 euros Weight 4.0 kg Suitable from year of construction 2004 Country of Manufacture Italy ECE approval mark 13 (Luxembourg) Coat versions Titanium; Black anodized aluminum design type Slip-on Standing noise dB (A) * 87 Driving noise dB (A) ** 83

plus
properly processed; still good fit; small increase in torque in the lower speed range.

minus
high driving noise; sensitive aluminum surface; Mounting clamp extremely difficult to assemble; partly sharp-edged.


12 silencers for the BMW R 1200 GS in the test


BILLION

Well done, but not a highlight.

Conclusion
The long stovepipe pleases with deep hum on low tours, there is a lack of volume upwards. Well done, but not a highlight.

MOTORRAD verdict: good

Placement: 12th place

BOS GP-2


12 silencers for the BMW R 1200 GS in the test


Lohse

Workmanship, fit and noise development are pleasing to the beautifully made BOS GP-2.

Weight: minus 19.6%
Performance: minus 2.9%
Sound: cultivated, full

providers
BOS exhaust,
Telephone 05941/4793,
www.bosauspuff.de

materials

stainless steel price 449 euros Weight 4.1 kg Suitable from year of construction 2004 Country of Manufacture Netherlands ECE approval mark 4 (Netherlands) Coat versions Stainless steel, blasted or black design type Slip-on Standing noise dB (A) * 86 Driving noise dB (A) ** 80

plus
keeps driving noise limit; to fit precisely and tension-free; insensitive surfaces.

minus
Performance and power delivery remain under series.


12 silencers for the BMW R 1200 GS in the test


BILLION

It remains lean on the test bench.

Conclusion
Workmanship, fit and noise development are pleasing to the beautifully made BOS exhaust. Only on the test bench does it stay lean.

MOTORRAD verdict: good

Placement: 9th place

GPR furore Nero Italia


12 silencers for the BMW R 1200 GS in the test


Lohse

Last place went to the GPR Furore Nero Italia silencer. The GPR damper looks cute and attracts with a low price.

Weight: minus 35.3%
Performance: minus 7.8%
Sound: shrill, aggressive

providers
GPR Distribution Germany,
Telephone 089/6133893,
www.gpr-germany.de

materials

Stainless steel / alu price 269.95 euros Weight 3.3 kg Suitable from year of construction 2010 Country of Manufacture Italy ECE approval mark 3 (Italy) Coat versions Natural aluminum; Carbon design type Slip-on Standing noise dB (A) * 90 Driving noise dB (A) ** 84

plus
compact design.

minus
Driving noise well above the limit; Holder difficult to assemble; partly rustic workmanship; poor performance.


12 silencers for the BMW R 1200 GS in the test


BILLION

Far too much power falls by the wayside.

Conclusion
The GPR damper looks cute and attracts with a low price. In return, however, far too much performance falls by the wayside.

MOTORRAD judgment: sufficient

Placement: 14th place

Had dark style


12 silencers for the BMW R 1200 GS in the test


Lohse

The Hattech muffler not only gives the GS a powerful sound, but also scores with a high-quality appearance.

Weight: minus 35.3%
Performance: minus 0.3%
Sound: deep, grumpy

providers
Hadch,
Telephone 07344/952586,
www.hattech.de

materials

Stainless steel / titanium price 548 euros Weight 3.3 kg Suitable from year of construction 2010 Country of Manufacture Italy ECE approval mark 3 (Italy) Coat versions Titanium; Stainless steel natural design type Slip-on Standing noise dB (A) * 89 Driving noise dB (A) ** 83

plus
custom-fit cultivation; clean finish with great details; beautifully made holder.

minus
high driving noise.


12 silencers for the BMW R 1200 GS in the test


BILLION

The performance of the Hattech damper.

Conclusion
The Hattech muffler not only gives the GS a powerful sound, but also scores with a high-quality appearance.

MOTORRAD verdict: good

Placement: 3rd place

Hurric Short Rac1


12 silencers for the BMW R 1200 GS in the test


Lohse

The Hurric muffler is a bit rough and sounds a bit too obscene for the GS.

Weight: minus 35.3%
Performance: minus 3.2%
Sound: slightly rowdy

providers
Fencer Drive,
Telephone 07023/95230,
www.fechter.de

materials

Stainless steel / alu price 269 ​​euros Weight 3.3 kg Suitable from year of construction 2010 Country of Manufacture Italy ECE approval mark 3 (Italy) Coat versions Carbon design type Slip-on Standing noise dB (A) * 89 Driving noise dB (A) ** 84

plus
tension-free fit.

minus
high driving noise; Original heat plate does not fit on the holder; sensitive surfaces.


12 silencers for the BMW R 1200 GS in the test


BILLION

Something is lacking in performance.

Conclusion
The Hurric muffler is a bit rough and sounds a bit too obscene for the GS. There is also a little lack of performance.

MOTORRAD verdict: satisfactory

Placement: 13th place

Laser Hotcam Dual Sound


12 silencers for the BMW R 1200 GS in the test


Lohse

The Laser Hotcam Dual Sound scores with its technically good appearance with a solid fit on the GS.

Weight: minus 33.3%
Performance: minus 5.4%
Sound: tinny, bland

providers
Hostettler,
Telephone 07631/18040,
www.ixs.com

materials

Stainless steel / titanium price 599 euros Weight 3.4 kg Suitable from year of construction 2004 Country of Manufacture China ECE approval mark 4 (Netherlands) Coat versions Carbon design type Slip-on Standing noise dB (A) * 87 Driving noise dB (A) ** 82

plus
quick and easy to assemble; great fit.

minus
high driving noise; sensitive surfaces; awkward to clean; small heat shield; weak power output.


12 silencers for the BMW R 1200 GS in the test


BILLION

The laser remains weak in terms of sound and performance.

Conclusion
the laser scores with its technically good appearance with a solid seat on the GS. However, it remains weak in terms of sound and performance.

MOTORRAD verdict: good

Placement: 9th place

SC Project SC-1


12 silencers for the BMW R 1200 GS in the test


Lohse

What a sound! The word silencer seems a bit out of place at SC-Project.

Weight: minus 56.9%
Performance: plus 2.0%
Sound: infernal

providers
Advanced Group,
Telephone 0039/3327/0874436,
www.sc-project.com

materials

Stainless steel / carbon price 540/395 euros (UPE / webshop) Weight 2.2 kg Suitable from year of construction 2010 Country of Manufacture Italy ECE approval mark 3 (Italy) Coat versions Titanium / carbon design type Slip-on Standing noise dB (A) * 94 Driving noise dB (A) ** 87

plus
first-class workmanship; excellent fit; quickly assembled; extremely light.

minus
Stationary and driving noise well above the limit.


12 silencers for the BMW R 1200 GS in the test


BILLION

The finish is great, but whether the race management agrees mildly?

Conclusion
What a sound! The word silencer seems a bit out of place at SC-Project. The finish is great, but whether the race management agrees mildly?

MOTORRAD verdict: good

Placement: 7th place

Shark Competition DSX-5


12 silencers for the BMW R 1200 GS in the test


Lohse

The Shark Competition DSX-5 is an inexpensive rear silencer that looks good with the GS. The sound is too shrill for the boxer.

Weight: minus 35.3%
Performance: minus 2.5%
Sound: shrill, aggressive

providers
Fencer Drive,
Telephone 07023/95230,
www.fechter.de

materials

stainless steel price 339 euros Weight 3.3 kg Suitable from year of construction 2010 Country of Manufacture Italy ECE approval mark 3 (Italy) Coat versions polished stainless steel design type Slip-on Standing noise dB (A) * 91 Driving noise dB (A) ** 86

plus
neatly processed with handsome weld seams; stable and tension-free to assemble.

minus
Driving noise well above the limit; Performance like series; Original heat plate does not fit; sensitive to scratches.


12 silencers for the BMW R 1200 GS in the test


BILLION

Unfortunately, the performance remains below the series.

Conclusion
Inexpensive rear silencer that looks good with the GS. The sound is too shrill for the boxer, on the other hand, and the performance remains below the standard.

MOTORRAD verdict: good

Placement: 9th place

SR Racing


12 silencers for the BMW R 1200 GS in the test


Lohse

The small exhaust manufacturer in Bavaria is and remains a guarantee for technically first-class systems. And the sound also fits the boxer.

Weight: minus 39.2%
Performance: plus 1.5%
Sound: powerful, sonorous

providers
SR Racing,
Telephone 08252/905540,
www.sr-racing.de

materials

stainless steel price 660.66 euros Weight 3.1 kg Suitable from year of construction 2003 Country of Manufacture Germany ECE approval mark 4 (Netherlands) Coat versions Stainless steel matt; titanium design type Slip-on Standing noise dB (A) * 90 Driving noise dB (A) **

83

plus
handcrafted cleanly; can be fitted precisely, quickly and tension-free; good output.

minus
high driving noise.


12 silencers for the BMW R 1200 GS in the test


BILLION

The performance of the SR Racing R 1200 GS.

Conclusion
The small exhaust manufacturer in Bavaria is and remains a guarantee for technically first-class systems. And the sound also fits the boxer.

MOTORRAD verdict: very good

Placement: 1st place

Termignoni slip-on


12 silencers for the BMW R 1200 GS in the test


Lohse

The one-piece system scores with its excellent surface quality and wraps the boxer in a fat cloud of sound.

Weight: minus 39.2%
Performance: minus 3.4%
Sound: full, sonorous, full

providers
Jamparts vehicle technology,
Telephone 07150/970565,
www.jamparts.com

materials

Stainless steel / carbon price 592.86 euros Weight 3.1 kg Suitable from year of construction 2010 Country of Manufacture Italy ECE approval mark 11 (UK) Coat versions Stainless steel; Titanium / stainless steel design type Slip-on Standing noise dB (A) * 86 Driving noise dB (A) **

82

plus
custom-fit assembly; great finish with first class welds and beautiful details; insensitive surface.

minus
high driving noise; Top performance remains under the series.


12 silencers for the BMW R 1200 GS in the test


BILLION

The performance is deficit.

Conclusion
The one-piece system scores with its excellent surface quality and wraps the boxer in a fat cloud of sound. Deficit: the performance.

MOTORRAD verdict: good

Placement: 5th place

Zard slip / on


12 silencers for the BMW R 1200 GS in the test


Lohse

The bag, which tapers to a point at the bottom, suits the GS exceptionally well and gives it a rich bass tone.

Weight: minus 39.2%
Performance: minus 0.5%
Sound: robust, juicy

providers
BOS exhaust,
Telephone 05941/4793,
www.bosauspuff.de

materials

stainless steel price 509 euros Weight 3.1 kg Suitable from year of construction 2010 Country of Manufacture Italy ECE approval mark 11 (UK) Coat versions Satin stainless steel / black aluminum design type Slip-on Standing noise dB (A) * 88 Driving noise dB (A) **

84

plus
simple, precise and quick assembly; neatly processed.

minus
Driving noise well above the limit; Performance like series.


12 silencers for the BMW R 1200 GS in the test


BILLION

No plus in terms of performance.

Conclusion
The bag, which tapers towards the bottom, looks particularly good on the GS and gives it a rich bass tone. No plus in terms of performance.

MOTORRAD verdict: good

Placement: 4th place

Final evaluation and conclusion


12 silencers for the BMW R 1200 GS in the test


BILLION

The final rating of our product test.

From the screwdriver’s perspective, many accessory silencers are on the winning side, score with great workmanship and chic details as well as easy assembly and an exact fit. But then, on the test bench, the disillusionment follows. For many, the macabre realization of the shortest tuner joke is once again true: Series performance achieved! The times in which a double-digit percentage increase in power output could be expected by simply repositioning the end pot are finally over. Because it is also important to comply with the legally relevant driving noises. And 80 decibels are not a sticky stick, as our test shows. Overall, many providers have done a good job. The best, however, only two that manage to create an almost perfect mix of performance, weight and noise.

Short test: Kesstech High Performance


12 silencers for the BMW R 1200 GS in the test


Lohse

In a short test, the Kesstech High Performance was examined carefully.

A little push on the button, and the good, babbling boxer sound with the flap-controlled exhaust system from Kesstech (Tel. 0 95 28/9 50 05 60, www.kesstech.de) turns into a mighty thunder. The installation should be done by a specialist workshop, as the on-board network is tapped for the electronic control. The result is impressive: In the measuring range (stationary / driving noises) the automatic system closes the flap so that all values ​​remain in the green area. And on the roll, the Kesstech-GS shows a full plus of six percent!

Expensive but well done. The high-performance exhaust from Kesstech has a flap control, which can optionally be ma-
closes manually or automatically. The two operating modes are activated via a push button in the cockpit. Price: 1739 euros (brushed stainless steel).

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