The No. 1 DIY car mod I recommend to everyone

Cars
For a few hundred bucks, a cold air intake like this K&N Typhoon will add power, efficiency, and prolong the lifespan of your engine.

Cold air intakes (CAIs) are like smartphone cases – they’re cheap, easy to install, and do wonders to protect your expensive investment.

CAIs are like big straws for your engine, allowing it to suck in more air that’s also colder because it’s farther away from the heat of the engine. With a bigger influx of cool oxygen, your motor can breathe better and create more tiny explosions – resulting in +5 horsepower, +1 MPG, and a longer lifespan.

CAIs run from $300 to $500 and can be installed with basic hand tools. As a cherry on top, they add a throaty growl.

Chris Butsch, Contributor