I just installed my M2 exhaust , I had the resonator deleted before I installed it, the problem is that I'm experiencing alot of highway drone I was wondering if this is normal with the M2 exhaust or is it because of the resonator delete. And will putting the resonator back help decrease drone ? Thanks for any help.

 

It's because of the resonator delete. Normally the M2 is supposed to be quiet and only loud when you stomp the gas pedal

 

+1 for Bob's comment...just get a midpipe, you can thank me later

 

Instead of putting the stock resonator in, you could put a magnaflow one, or just a simple glass pack in its place. That would yield a louder note from your M2 and keep the drone down. The easiest way is to do what quick123 suggested and get the mid-pipe.