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Help Kooks Headers vs Corsa CB Exhaust

Hi Everyone,

Took a little time but everything was installed last week and I was able to get some videos. I did not get any reving shots yet but I think the start-up video is enough to give you an idea of the sound coming from the corsa system. Both videos were taken inside my garage so little outside noise interference and the car was the same distance from the mic (iPhone 13 Pro). Both videos are completely cold starts (At least 1-2 days between starts). Video was taken using an Insta 360 X4. I have no other modifications done to my car.

Summary thoughts: The corsa extreme system is significantly louder than the factory system. As expected videos do not do it any justice. You hear the difference much more from outside the car vs windows up but the change is definitely noticeable inside the cabin under throttle. As others have mentioned valves closed to me actually sound quieter than the factory exhaust. I know the decibel readings below don't confirm that but its something about the tone. It is whisper quiet even on cold start-ups with the valves closed. So if you are concerned about your neighbors don't be. Overall extremely satisfied with the system and the direction I went. I will save the headers for when its time to make performance gains.

Decibel readings were as follows:

Cold start factory: Max (106.9) Settle (~84) Valves Closed (79)
Cold Start Corsa: Max (118.1) Settle (~98) Valves Closed (81)

My friend Grok says:

118 dB vs. 106.9 dB (≈11.1 dB difference)​

  • Intensity: The 118 dB sound has about 12.9 times more acoustic power than the 106.9 dB sound.
  • Perceived loudness: It sounds roughly 2.1–2.2 times as loud.

98 dB vs. 84 dB (14 dB difference)​

  • Intensity: The 98 dB sound has about 25 times more acoustic power.
  • Perceived loudness: It sounds roughly 2.6 times as loud.
Hope that helps others in their decision making if you are just chasing sound improvements

First time uploading to youtube so here goes nothing....

 

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