3rd cat delete decibel reading for track days

[GtheSheep]

Hi,
Wondering if anyone's had a noise readings taken after doing the 3rd cat delete (stock exhaust)? Or generally made it through track day testing with it on.
Have seen the video of the Brands track day with the axel-back Milltek, but wondering if the 3rd cat delete alone would end up outside of the track day limits?
Cheers

 

[Dragoon]

This video might help you out a bit. Flybys start at about 1:45 into the video.