The good? The bad? Nah, just the ugly. A compilation of the worst car modifications we have come across lately.

There are various different ways to boost your car's horsepower, from replacing engine parts with performance-enhancing mods to installing things like spoilers to improve handling and reduce drag.

With a good grasp on your car’s fuel numbers, it’s also important to test your mods scientifically. Throwing on some “improvements” and doing a lap of the block while reading the ...