Yes, like a PCIII. If you open the lid and/or swap to a higher flowing aftermarket filter you are going to be letting more air. As a result, your mixture will be leaner than before you got to fiddling. A little lean will give you a bump in power, at the cost of higher temps. But this is a dangerous gamble since you're not sure what the right 'little ' is if you just start swapping bits around.
Too lean and you can cause damage that might be as little as burnt plugs and as bad as holed piston.
I do have a PC3 but I disconnected it temporarily (for better mileage). I'll set my PC map to air box mod and slip ons when I get home. Can't afford a proper dino at the moment.