Pretty sure any aftermarket exhaust is going to be over the 90dB, or correct me if I'm wrong here? Mine has a low drone/rumble, it's not a whiny loud exhaust, but I doubt that makes a difference. And I know I can't just put a silencer on since it wouldn't be allowed in the test.
So, my only option - Can someone lend me a stock exhaust for a couple of days, so I can go and get this test done? Happy to pay obviously, just don't wanna change anything.
And I bet it's cos my car's 'black', just can't win

Edit: Tested @ 4950rpm, bit excessive I think, seriously, I haven't even revved it to 4950 in like 3 years.