
Originally Posted by
Daveyboyjunior
Hi Jack, if this noise has only started since the exhaust upgrade, then it's an exhaust sound.
The turbo will only begin working properly whilst in gear and at about 5psi you'll start to get nice noises!
I agree that the noise your hearing is probably the turbo spooling.
Your new 3" exhaust is acting like a bell.
Just my thoughts, but as said, just keep an ear open.