Lightweight exhaust that meets noise restrictions

[Smallblock454]

In Germany we have another exhaust system. That has only the rear 400 cell catalysators and no catalysators at the manifolds.

My car documents say
Stand noise: 97 dB/A
Driving noise: 75 dB/A

Pretty shure that there are differences how the noise is measured in Germany and in the US. In general a US stock exhaust is louder than a EU stock exhaust.

Regards, Markus

[edc]

Originally Posted by Smallblock454

In Germany we have another exhaust system. That has only the rear 400 cell catalysators and no catalysators at the manifolds.

My car documents say
Stand noise: 97 dB/A
Driving noise: 75 dB/A

Pretty shure that there are differences how the noise is measured in Germany and in the US. In general a US stock exhaust is louder than a EU stock exhaust.

Regards, Markus

I can't imagine it would be. For 986 in UK like most of Europe you just have the rear cats and the same single box design exhaust. I have recently swapped back to the standard 400 cell cats from 100 cell ones and whilst yes it is quieter I would expect another pair of cats in the system would dampen the sound a lot more.