88.4ageGT wrote:how is it a step down from factory?
As said, it's sucking in hot air. Cold things have less energy and expand less, so you're basically getting less air when it's hot.
My advice is to replace that Simota filter with the factory airbox and get yourself a decent panel filter replacement from A'PEXi or similar.
From there, with $1500 or so to spend you don't have much to play with. As said, you won't get any performance worth talking about out of that. For $1500 you should be able to get a full exhaust system made up, including headers. That's your power basics for a non-turbo sorted, but it won't do much for you.
I'd go with the suggestion of suspension mods, or brakes. Use the small amount of power you have and work on being able to maintain that power as you drive with handling upgrades.
EDIT - If you want to talk about body kits then you should probably not be worrying about modifying your car for performance.