How Do Turbo Whistles Work

As the name suggests, a turbo whistle sounds like a high pitched whistle or whining sound, heard when the turbocharger kicks in as you accelerate and the revs go up. … In fact, some people purchase aftermarket ‘turbo whistler’ devices that fit inside the exhaust of a vehicle to mimic the sound of the turbo whistle.

Are exhaust whistles illegal?

Exhaust whistle may not be legal on the street, depending on where you live. For example, it may be illegal in strict states like California but fine in others. Exhaust modifications are illegal in California if your car produces a sound of more than 95 decibels.

Should a diesel turbo whistle?

Turbo diesels will always make a whistle noise BUT if the noise has got louder all of a sudden it’s poss an intercooler leak , or a split it an air pipe , this will def be the case if the car had lost power at the same time I.e turbo boost pressure is leaking out of the system .