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Old 10.11.2019, 10:34
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Need help with aftermaket exhaust with Valve

Hello, so i just bought an exhaust with valves for my alfa romeo, i know that it has homologation if i keep valve closed , But someone just told me exhausts with valves are illegal in switzerland?????



I live in the canton of Jura and would appreciate if someone could tell me if i can really have it or not because i have a friend at work who has one with valves and he never had any troubles
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Old 10.11.2019, 17:18
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Re: Need help with aftermaket exhaust with Valve

Not sure about aftermarket, but every sportscar, powerful saloon/hatchback that I can think of has valves in the exhaust, so it's not possible that they are illegal.
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Old 10.11.2019, 19:15
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Re: Need help with aftermaket exhaust with Valve

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Not sure about aftermarket, but every sportscar, powerful saloon/hatchback that I can think of has valves in the exhaust, so it's not possible that they are illegal.
Unless it's one of those whose sole function is to make the exhaust louder, but close the valve to pass noise control regulations, which is what I suspect it's being referred to be.

Pretty sure they wouldn't be approved, and therefore would not be allowed. Chances of it being noticed by police if stopped probably quite low unless it's being used in loud mode and attracts their attention thereby. Chances of it failing an MFK? Pretty high, I'd have thought.
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Old 10.11.2019, 22:55
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Unless it's one of those whose sole function is to make the exhaust louder, but close the valve to pass noise control regulations, which is what I suspect it's being referred to be.

Pretty sure they wouldn't be approved, and therefore would not be allowed. Chances of it being noticed by police if stopped probably quite low unless it's being used in loud mode and attracts their attention thereby. Chances of it failing an MFK? Pretty high, I'd have thought.

I don't understand how many people use them then, they don't even know how to switch it alone i doubt they pay to go stock everytime mfk comes up

talking about people i know btw

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Old 11.11.2019, 11:01
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Re: Need help with aftermaket exhaust with Valve

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Unless it's one of those whose sole function is to make the exhaust louder
My understanding is that that is the exact reason why those valves exist...

If the exhaust is homologated, then surely that would count for the entire system, including the valves? (Although I'm no expert in this area)
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Old 11.11.2019, 11:28
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Re: Need help with aftermaket exhaust with Valve

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My understanding is that that is the exact reason why those valves exist...
Not all of them. Valves are used in some OEM systems to vary the exhaust length for better power, which may or may not make them louder at certain revs but will still be within regulation limits. There are also valves on many diesels for Exhaust Gas Recirculation, something to do with reducing emssions.

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If the exhaust is homologated, then surely that would count for the entire system, including the valves? (Although I'm no expert in this area)
The OP isn't clear about this.
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i know that it has homologation if i keep valve closed
I'm no expert either, but surely either it is homologated or it's not. so the OP is really the only person that can answer his own question.
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Old 11.11.2019, 12:11
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Re: Need help with aftermaket exhaust with Valve

Quote:
Unless it's one of those whose sole function is to make the exhaust louder, but close the valve to pass noise control regulations, which is what I suspect it's being referred to be.
Exactly this is the difference between allowed and not allowed valves. Most modern vehicles have exhaust valves (German: Klappen). They might even be used to lower the noise far bellow what is the permitted.

If an after market exhaust system has type approval for a certain vehicle it is apparently legal. You will need a complete supplier statement about conformity. Most systems sold abroad have an incomplete conformity statement and lack certain mandatory information.

For example if the system has type approval according REGULATION (EU) No 540/2014 document must have the following information:
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9. INFORMATION INTENDED FOR USERS AND TECHNICAL INSPECTION

9.1. Each replacement silencing system shall be accompanied by a paper document issued by the manufacturer of the replacement silencing system or his representative. That paper document shall at least bear the following information:

(a) EU type-approval number of the replacement silencing system (the 5th section indicating the number of the extension of the type-approval can be omitted);

(b) EU type-approval mark;

(c) make (trade name of manufacturer);

(d) type and commercial description and/or part number;

(e) company name and address of manufacturer;

(f) name and address of the manufacturer's representative (if any);

(g) data of the vehicles for which the replacement silencing system is intended:
(i) make,
(ii) type,
(iii) type-approval number,
(iv) engine code,
(v) maximum engine power
(vi) kind of transmission
(vii) any restriction concerning the vehicles where the system can be mounted
(viii) sound level for the vehicle in motion in dB(A) and stationary sound level in dB(A) at min–1 (if deviating to the values of the vehicle type-approval);

(h) mounting instructions.

9.2. If the paper document referred to in point 9.1 consists of more than of sheet of paper all sheets shall bear at least a reference to the EU type-approval number.

9.3. The information concerning point 9.1(g) and (h) may be provided on the website of the manufacturer if the website address is indicated on the paper document.
For more detailed information, directly from the authorities please read the ASA guideline No. 11 which is available in German and French.
https://asa.ch/it/biblioteca-online/promemoria/
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Old 11.11.2019, 22:47
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Re: Need help with aftermaket exhaust with Valve

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My understanding is that that is the exact reason why those valves exist...

If the exhaust is homologated, then surely that would count for the entire system, including the valves? (Although I'm no expert in this area)

The exhaust has homologation and comes with homologation papers, When i say it has homologation only with valves closed i mean exactly that, legal if closed, But, if i go to a race track for example, i can open the valves, But yes, if i keep them closed i'm supposedly legal, I just got confused because a guy told me that valve systems are illegal in switzerland.



Thank you all for the replies guys, i talked with someone more expert on the subject and he told me it's fine as long as i keep them closed and have the homologation papers
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Old 11.11.2019, 22:53
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Re: Need help with aftermaket exhaust with Valve

But i will e-mail the website that sells the exhaust to know more info
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Old 13.01.2020, 11:37
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Swiss Exhaust Laws

Hi everyone, I've recently moved to Geneva and would like to get some downpipes for my car. As far as I know, for any modification made to the original car, I need to get approval from the Swiss road and transport authority. My question is: since these downpipes do not remove the primary catalytic converter, the car would still pass emissions tests, so what if for example, I drove my car to France, got a mechanic to install the downpipes, and then drove the car back to Switzerland without notifying anyone of anything. The exhaust in the car has a valve which can be opened and closed meaning that the car would only sound a little bit louder only when I open the valve. I understand everyone has their opinion on noise and noise pollution which is why I am only getting this mod done because I can keep the car quiet when I want it to be.
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Old 13.01.2020, 11:45
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Re: Swiss Exhaust Laws

IŽd think that you have an issue latest at the MfK (or whatever that is called in Geneva)
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Old 13.01.2020, 11:47
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Re: Swiss Exhaust Laws

If they are after the muffler, there is no problem.

Tom
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Old 13.01.2020, 11:49
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Re: Swiss Exhaust Laws

It is not a matter when you want, but the when the law says you must.

For any car mods please see ASA directive No. 2a https://asa.ch/it/biblioteca-online/direttive/

And regarding exhaust in particular the additional information in ASA explanatory leaflet No. 11
https://asa.ch/it/biblioteca-online/promemoria/
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Old 13.01.2020, 12:06
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Re: Swiss Exhaust Laws

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IŽd think that you have an issue latest at the MfK (or whatever that is called in Geneva)
Depending on placement, they may or may not notice, but that doesn't make it legal to use non-homologated parts. There was another thread about this recently, which I'll merge with this one.
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