Under the Hood

The Under the Hood Channel explores the systems that make your car function correctly. Learn about car parts and systems and how to do routine maintenance.


There are plenty of great reasons to design a car with its engine in the front; however, the same can be said for placing the engine behind the driver. Does engine placement really matter?

Modern car and truck engines are typically efficient and powerful at the same time. But is there a relatively simple way to free-up some additional horsepower through the exhaust?

A cold air intake is one of those rare modifications that works pretty well on its own. But how much horsepower can you really expect to gain?

Replacing your car's stock muffler with a performance muffler is a good idea -- that is, if it's a rusted-out mess and you need to replace it anyway. But will this mod actually increase horsepower?

If you're serious about increasing your car's horsepower -- and you have deep pockets -- your options are almost unlimited. But what can you do if you're on a tight budget?

Have the horses under your hood turned into mere ponies? If so, you and your four-banger may have a power problem on your hands. Here's how you can tell.

A supercharger is a considerable investment; however, it's also one of the best ways to improve the fun factor of driving your car or truck. How much additional horsepower should you expect?

It seems like clearing out the exhaust as fast as possible would give you a bit of an edge over the competition. But does a dual exhaust system really improve your car's performance?

If you've ever watched a real pro in action, paintless dent removal appears deceptively simple. But is it really as easy as it looks?

There are so many dangerous, irresponsible and downright ridiculous things you can do to a car while "fixing" it that it was difficult to narrow this list down to just 10 examples.

How would you like to save $300 to $400 million on your annual fuel bill? The U.S. Navy is ready -- and they'll do it with rotating detonation engines.

Modern cars and trucks can keep track of their own health. The problem often comes when they try to communicate their information to the driver. How does your car talk to you?

A sun visor's primary role in any car is pretty straightforward, right? But as far as automotive designers and aftermarket electronics manufacturers are concerned, anything can be improved.

A gloss paint job can be tricky, as it easily shows imperfections. With this in mind, the team takes extra special care when painting the '67 Ford Mustang. Get a closer look at the paint job in this video from Fast N' Loud.

After perfecting the paint job, the Gas Monkey crew attempt to install the transmission -- after they've already installed the motor. Check out the video to see if they can get pull off the installation in this video from Fast N' Loud.

It's time to build the perfect tubing for the Bronco -- and, of course, this is as much of an art as it is a science. Tune in for a closer look at the building process in this clip from Fast N' Loud.

The Gas Monkey has run into a problem: the Bronco that they're supposed to restore is almost rusted completely through. Can the guys fix the body in enough time to get it done by the deadline? Tune in and find out in this clip from Fast N' Loud.

As the team continues their work on the Bronco, they decide that they'd like to lift the vehicle, raising it and giving it a more aggressive stance. Tune in and check out the custom work involved in lifting vehicles in this clip from Fast N' Loud.

She talks, she jokes, she knows where all the best restaurants are, and she's even handy with a map. Now Siri may be coming to your car.

Most auto manufacturers want to make it clear that they're not trying to take driving away from the driver. But research shows that we could use a little help in the braking department.

The design is a little odd, but a center-mounted airbag might keep you from smacking skulls with the other front seat passenger during a side-impact collision or rollover.

Do you know how Opposed Piston Opposed Cylinder (OPOC) engines work? Check out this amazing graphic that explains how OPOC engines work!

Do you know how sleeve valve engines work? Check out this amazing graphic that explains how sleeve valve engines work!

From a user's standpoint, MirrorLink is pretty slick. It's the magic that makes your smartphone's computer and the car's computer talk to each other.

Did you know that Goodyear has been making run-flat tires for NASCAR since 1966? Decades later, tire engineers are still perfecting the design for everyday drivers on public roads.