Hello,
Is that normal sound with Catless dp on cold start? N20. 30-50 seconds after, the sound is normal.
I have seen people disable the cat warming function and the noise goes away.
Will cold start delete help with mettalic rattle? Cold start sound is tinny and sounds like it leaks (Probably wastegate).
https://youtube.com/shorts/NKmCOilmw6k?feature=share