Valve exhaust systems allowed in Switzerland ex factory

The topic of noise, due to a flap exhaust system, is currently also clearly on the rise in Switzerland. While tuning with a front spoiler, a lowering or a foiling has no effect on the noise of a vehicle, this is of course different in a modified exhaust. And to buy there is virtually everything that the motorist's heart desires and many who have nothing to do with the topic tuning sucks, Especially the noise caused by the modified vehicles is more and more of a thorn in the side of residents and authorities. Even in Switzerland you want to eliminate droning engines in road traffic as far as possible. And here it concerns the authorities, as well as in Germany, in particular around the noise production by means of so-called flap exhaust systems. Here, a popping is often generated especially during the switching process. But even in Switzerland these facilities are not generally prohibited. The law in Switzerland prohibits merely the willful generation of unnecessary noise in residential and recreational areas and flap systems retrofit exhaust systems that previously did not have this function.

Damper systems can be registered

For optical and noise reasons, often only the exhaust silencer is changed. These changes are often not required to report and check. At least if there is a supplier confirmation. Here it must be confirmed for which vehicle type the plant was manufactured. The leaflet on replacement silencers, catalytic converters and particle filters shows which systems can be used, for example, after being approved and thus not required for reporting and testing. The supplier confirmation must always be carried. If the information leaflet is missing, an inspection must be carried out by an authorized inspection body (DTC, FAKT, Exhaust Emission Testing Center Nidau). Because exhaust systems with adjustment are only allowed if the confirmation is that the noise regulations discord be respected. Whether open or closed. And even with a valid declaration of suitability, the authority can initiate a reference level measurement if there is cause for doubt.

Of course that had not been the case.

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