Around 105-110db, so safe to say it has a silly loud bean can.
Alot of supported engine work done over the past decade, so it’s not all bark mind :)
....Plus i run a sprung baffle, so its silent unless it’s a full chat.
Wierdly my wee (stock) Abarth shopping trolley is alot more asbo.
Sorry to dissapoint no neons, or banging sound system :(
That's the dump / blow off valve. On very high pressure turbos it's actually needed and it releases back pressure in the exhaust when you take your foot off the gas.
Usually not heard if the car is driven properly, which the chav numpties don't. The noise is achieved by hard acceleration, then instantly lifting off, rather than decelerating gradually.
And yes, it is silly.
What's not to like?