You already have a cold air intake, been stock on Rangers since mid-1980's and fuel injection.
If you are looking for bolt on stuff then there isn't any.
Exhaust is tuned for mid-range power stock.
Your 2010 2.3l DOHC should be 143 HP @ 5250 RPM 154 lb-ft @ 3750 RPM, so not to bad for a 4cyl, only a few HP shy of the 3.0l Vulcan V6 used in Rangers until 2008
You can look at what you rear axle ratio is now, higher ratio gives you better off the line power.
Point of the 4cyl in a small pickup is light hauling with good MPG, power was available with the 4.0l SOHC V6 engine option, and with it much lower MPG

.
With a 4cyl you want to add a turbocharger, so save your money for that.
You have the 2.3l Duratec DOHC engine, a Mazda L engine.
Rangers got these in mid 2001 until end of production.
1998 and older Rangers had the 2.3l Lima SOHC engine, no relation to the Duratec 2.3l
So any searches you do make sure the info applies to the 2.3l Duratec engine