76mm exhaust sound control valve.

[luigidan]

Would any of you lovely people have an idea on how and even where I could get something to quiet down the exhaust on my datsun when going through sound testing. I would rather have some kind of valve fitted permanent over the silly bungs that bolt to the jap can. Any advice will be greatly appreciated

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[MaccyD]

https://www.google.co.uk/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=exhaust control valve

If only there was some kind of way to control exhaust gases, with some kind of valve, an exhaust gas control valve if you will

 

[Disco]

If only there was some kind of way to control exhaust gases, with some kind of valve, an exhaust gas control valve if you will

You are some kind of sorcerer...

 

[thenextdk]

Does anyone ever do their own research before asking the dumbest of easily answered questions?!?!

Absolute fuck badger

 

[NTC Jay]

thing is its all well and good getting through sound test ok, but most track days will monitor noise throughout the day and warn/black flag excessively loud cars.

so id say be prepared to have your 'exhaust valve' closed all day.

 

[PhillE30]

an exhaust valve alone wont make the car quieter, you need to run it in a system with a silencer, then the valve opens and allows the gases to pass into an un/less silenced system

 

[NTC Jay]

also that