you should have bought an intake with those holes, a breather filter is ok for the one on the engine block and im not positive but it could be for idling, the other smaller one that was connected to the top of the intake is smaller and i dont think you can fit a filter on that one, but you could probably rig something up, dont just leave them and forget about them because they are needed for something and your car will run shitty if you leave them off.