Exhaust pulses clicking/fluttering out of tips after cam install. Losing my mind.

[Parrot]

Hi. Here's my G8.



And here's two more cars doing it for good measure.

https://www.youtube.com/watch?v=bSIhbctOLZ8

https://www.youtube.com/watch?v=GKGyyZdv0oI

I have only found a couple of threads pertaining to this, all resulting in no conclusion.

I've heard it across multiple exhaust setups. My entire motor is brand new, and has been meticulously examined for the cause. Nothing is broken.

This appears to be tune related. I've heard multiple G8s with my same exhaust setup and cam not make this clicking/fluttering noise.

https://www.youtube.com/watch?v=9BwElwA_CFE

This car only does it as RPMs drop after revving.

Here's a car with a different cam and the same exhaust setup doing it.

https://www.youtube.com/watch?v=QbNU4B5aWL8

Here's two cars with the same cam and different exhaust setups not doing it.

https://www.youtube.com/watch?v=3H2sknvMkuc

https://www.youtube.com/watch?v=s6Eh3SrdFco



Someone please help me. It's 5:20AM.

[Slizzo]

Yeah can't imagine you'd hear anything mechanical all the way back there out the tail pipes.

How are the cats on your exhaust? They in good shape? Everything tightened up and away from rattling on anything? Hangers look OK?