i have an apexi wsII for a good 8 months but i have noticed that it kind of moved. it is now it is rubbing against the bumper and causing an annoying vibration when it idles and when i press the brakes in neutral.

is there a way i can shave part of the bumper where the exhaust sits in the U part of the bumper?

or is there a way to realign the muffler

or can i just put in some heavy duty foam of some sort so it doesn't rub