removed up/low resonators--what does this mean...like what part of the car...and what gains for doing this

Resonators are part of the exhaust... essentially removing them doesn't do much of anything as far as gains go but they will change the sound of your exhaust depending on what size piping, muffler, header blah blah.

for the zx2 there are 2 resonators on the intake. one upper and one lower. The upper is right after the tb elbow and can be replaced with a flared end 2.5" pipe. the lower is after the airbox and looks like a gallon container....you just remove it.

expect to see all of 1hp on a stock car

the exhaust resonator I dont think youll see anything at all.

And please specify next time which kind of car you are talking about....its ok now where most of us have zx2s but we arent a zx2 site

lol whoops I just figured he was refering to the exhaust I didn't even notice the upper/lower part just seen the word resonator. Anyways yeah what he said.... your still not gonna see a lot from it.