In stock form, you’ll find that the engines in Tacomas are very capable engines that need very little in terms of modification. They produce ample power and back that power with efficiency. When you start loading up your truck with heavy add-ons for off-roading and work, the engine can start to feel bogged down with the additional weight. By raising the power output, the engine will struggle less and perform as it would, if not better, than it would in stock form.
Cold Air Intake: Engines rely on air intake to produce power. A cold air intake draws in more dense air, which can contain much more oxygen. The additional oxygen will increase power output and may even help with fuel economy. No major gains will be had with these units alone, but they are the first step to take when seeking out additional power.
Computer Programmer: The factory program on your Tacoma is designed to handle a combination of driving types and provide ample power across the board. This is great for daily driving but it will keep some additional ponies in the stable. With a programmer, you can rewrite the stock setting to let those beasts run wild.
Boost: The engines in Tacomas are usually naturally aspirated from the factory. Natural aspiration leaves the engine to rely on vacuum generated by the pistons on the intake stroke to draw in air. With forced induction, you’re jamming air into the chambers. This is a great way to add a ton of power to your Tacoma with one stroke at a time.