is there any sensor on resonator?
on the 09, there was none but I wasn't sure on the newer RS.
I am considering getting JT's set up or keep the stock air intake with k&n filter and possibly run a good quality hose to it but get rid of resonator.
I don't think it does much by itself(same with free flow exhaust) but both are good compliment to fuel modification, whether thru something like powercommander or ECU flash.
more air in, more air out with more fuel = more power.