[frankl]

okay so i unbolted my exhaust after the cat cause i wanted to hear some turbo and most of the time it the engine noise is reasonably quiet and the turbo doses nicely, but randomly i cant hear the turbo and the engine noise can be heard streets away? i’m not sure why it does this it just seems to randomly come and go?  any ideas ?

[CraigB]

Putting the exhaust back on will fix it, it'll also prevent Carbon Monoxide from entering your cabin space