So exactly at 1500rpms (no more, no less, exactly on the dot) I get a slight virbation in the exhaust. What in the hell is it? I've always ignored it but now I'm kindaaa bothered

It happens anytime of the day. It's not to the point where I'm hating on the exhaust or think its a problem and I want to kick the exhaust off or get under there and jiggle or anything, but just want to know the cause of it.

Running: 2.25" CBE w/ Magnaflow Exhaust - 2 x Resonators

Mods are in sig if that helps.

 

Maybe the person who installed forgot one of the rubber hangers?

Could it be the flexible part of the downpipe broken?

Did you check the fitment before heading out the shop?

The RA's engine dances in that bay like no tomorrow, maybe thats it( At least in mine is like this last one

 

Rubber hangers are still intact.
Nah nothing is broken.

Hmm... I was thinking perhaps something to do with air pressure down low. Not sure..

 

i took the RA to the dealership to check some annoying noise in the rear end and for my luck they went "errmm your flexible is busted" and offered to change it. Its the same sound the OP describes. TBH it started doing it with 1k miles or so(12k atm)....mitsu repacles it under guarrantee...they said its $800 but its covered. Still they let me go without fixing the rear end sound...