That's odd I have the same setup and no major droningJust got this catback and installed last week. Paired with the invidia headers, this setup drones like mad between 2900 - 3500 rpm and makes highway cruising impossible.
Is there a break in period for the catback? Is anyone else having drones with invidia headers and catback?
That could be it. My exhaust does rattle at idle, which is common for the q300.you sure what you are hearing is not the mid-pipe pressing against sub-frame?
common problem with this exhaust
There is another solution before you go and sell, but it stems into the realm of the experimental, although it has been proven:I guess it's just the combination of all my others mods that make this catback incapably of cancelling out the drone between 2900-3500rpms.
Time to sell this catback