[Eric Boe]

Has anyone measured the noise level of the NPP exhaust and compared that with their local noise ordinance?

Do the GM engineers take noise regulations into account when designing the exhaust sound, and does the NPP with all four pipes open (active sound management off or Sport/Track mode) comply with all regulations?

I like the sound and extra 10% mileage, but not to the tune of a ticket.

Eric

 

[mjw930]

Has anyone measured the noise level of the NPP exhaust and compared that with their local noise ordinance?

Do the GM engineers take noise regulations into account when designing the exhaust sound, and does the NPP with all four pipes open (active sound management off or Sport/Track mode) comply with all regulations?

I like the sound and extra 10% mileage, but not to the tune of a ticket.

Eric

All exhausts must meet strict federal EPA standards for noise. The NPP optional exhaust meets those standards.

Since most local municipalities do not have the knowledge, training or equipment to properly measure noise they usually reference the federal standards and base enforcement on a visual inspection. Basically, if you have an unmodified factory system you are in compliance nationwide. If a local municipality tries to say otherwise any halfway decent lawyer could get the case kicked.

How do I know this? A friend from a past life made aftermarket motorcycle exhausts. Noise regulations are virtually identical regardless the type of road legal motor vehicle.


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[Tpalmst]

A trash refuse truck will drown out the sound of your car don't be embarrassed to that fact.

 

[53Vette]

Just don't redline it near a cop.

 

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[PoconoG]

Just don't redline it near a cop.

Don't even get close, my stripes and sound attracted my first state cop tonight.....lol. No ticket, and it was kinda fun to watch him do a 3 point turn when he saw me.