Skip to main content

These are the car modifications you should avoid

These car mods are silly, useless, or illegal

A heavily modded Lexus
F. Muhammad / Pixabay

Modding is a great way to truly make a car your own, and some people even buy a vehicle just to modify it as much as possible. Mods can make a vehicle look unique, overcome the stock vehicle’s shortcomings, and drastically increase performance. However, some car modifications come with major downsides.

Improperly installed mods, or mods that go a bit too far, can make your custom car a lot worse or may even break it completely. Then there are mods that fall foul of the law and can land you a ticket, void your warranty, or cause your car to fail its annual inspection.

Here are four relatively common vehicle mods that we don’t believe are worth the effort. You’re better off swerving the things on this list, and splashing out on a bit of trim if you’re aesthetically minded, or something like an engine remap if you’re all about performance.

A tire technician changing worn tires.
Ivan Radic/Flickr / Ivan Radic/Flickr

Oversized wheels

Big rims stand out, and it’s easy to understand why people get them on their vehicles. However, if you go too big you’re going to have problems. Many vehicles come with a range of options when it comes to wheels. Usually, you can opt to go a couple of sizes up if you pay a little extra — but the sizes stay within reason. Say a vehicle has 18” wheels as standard; there may be a 21” option available.

Going beyond the options the manufacturer makes available is usually a bad idea. For a start, any change in wheels will make the speedometer inaccurate, so you’ll have to have it recalibrated. Bigger wheels also put more strain on parts like the powertrain and brakes — which means you’ll be in for an expensive repair bill sooner or later. They also effectively gear the car up, so acceleration might be noticeably impacted. Yes, they look good, but the negatives may outweigh the aesthetics after a certain point.

Audi with tinted windows
F. Muhammad / Pixabay

A heavy window tint

A heavy window tint is actually pretty practical. It can reduce the chances of the sun impacting a driver’s sight, and can keep passengers who don’t want to be seen out of view. Unfortunately, it’s also a legal minefield in the United States.

Various tint-related laws are on the books, and these vary from state to state. Some relate to the darkness of tint allowed, while others outline exactly what windows can and can’t be tinted. Tints are also very easy to spot, so if you do break or come close to breaking the law, you’re an easy target for any cops you drive past. Even if your tint is legal in your home state, it may mean you can’t drive through the state next door without problems. As a result, we can only recommend you swerve this kind of mod altogether.

2018 Jeep Grand Cherokee Trackhawk exhaust
Photo by Miles Branman/The Manual / The Manual

A modified exhaust

Exhaust mods are pretty common, and they’re also illegal in several states. While you’re unlikely to get pulled over for an illegal exhaust, your vehicle will fail inspection in states like New York and California if it has an aftermarket exhaust.

You’re facing two issues if you opt to swap out your exhaust system or muffler. The first is related to emissions. In an attempt to limit the damage our vehicles do to the planet, various laws are in force limiting what can come out of your car’s tailpipe. If your new exhaust doesn’t meet those standards, your car can’t legally be on the road.

Then there’s noise. Several states have passed laws limiting the amount of noise an exhaust system can produce. As you may have noticed, many exhaust mods only exist to make a vehicle as loud as possible. If your new exhaust’s decibel level creeps over the state limit, then your car suddenly becomes illegal.

Even if aftermarket exhausts are legal in your state, they’re unlikely to be consequence free. Exhaust mods are often one of the things that can void a manufacturer’s warranty, and you may be left on the hook for repair bills you could have otherwise avoided.

Coil spring car suspension
Marcin / Pixabay

Messing with the suspension

This is more common with trucks and SUVs, but many car owners opt to lift or lower their vehicles for various reasons. Some people like the aesthetics, some lower the vehicle for improved stability in the corners, and others lift the vehicle in an attempt to boost offroad performance.

Unfortunately, unless you really know what you’re doing, this is a great way to absolutely ruin your vehicle. Even raising the vehicle by a couple of inches can drastically affect its handling and stability. Plus, it’s a car, so any benefits when it comes to road hazards and offroading aren’t likely to outweigh the catastrophic impact it has on the vehicle’s general usage.

Lowering your car can increase your risk of damaging your vehicle when traveling up and down a ramp, hitting a pothole, or climbing a kerb. You could easily damage your car’s trim, exhaust, or oil pan due with this unnecessary mod.

Modifying your vehicle’s ride height can also lead to wheel alignment issues. Wheel alignment is one of those things you can’t really fix yourself as getting it spot on requires tens of thousands of dollars worth of specialist equipment. Wheel alignment problems can lead to uneven tire wear, tracking issues, and the vehicle seemingly attempting to shake itself apart if you drive faster than 50 mph.

Editors' Recommendations

Topics
Dave McQuilling
Dave has spent pretty much his entire career as a journalist; this has included jobs at newspapers, TV stations, on the…
These 5 classic cars look more futuristic than the Tesla Cybertruck
The DeLorean is obviously on the list
McLaren F1 Bugatti Veyron race front view

The Tesla Cybertruck has caused controversy in a few ways. Its announcement was a bit of a disaster, with a lightly thrown steel ball shattering two of its supposedly “bulletproof” windows. Production has been delayed numerous times, with everything from a chip shortage to horrendous quality control issues being to blame. And its looks have proved divisive, with some praising its daringness like a hideous child’s mother would compliment their personality -- while others point out it looks horrendous.

While you can’t argue its appearance is “unique,” outside of the world of low-poly count video games anyway, rolling the dice in terms of appearance is nothing new in the automotive world. The difference is that risk has paid off for other manufacturers because their cars actually looked appealing. Even the Cybertruck’s attempts at looking retro-futuristic aren’t anything novel. There are decades-old "futuristic" cars that look far out and are generally better than Tesla’s electric pickup. Here are five classic cars that have the Cybertruck beat.

Read more
Chevy Silverado, Ford F-150, Tesla Model Y: These are the most popular cars in every state
Which vehicle has the broadest appeal?
2019 Chevrolet Silverado

When it comes to the popularity of cars and trucks in America, television ads would have us believe that somehow, in some way, every car and truck seems to be the best at this or offer the most of that in its class. Advertising, however, always has a way of being not-so-subtly subjective. But the objective truth lies in pure numbers and bottom-line results. Edmunds did the dirty work for all of us and collected retail registrations across the country, much in the same way we covered the most valuable colors for used cars some time ago.

Rental sales and government purchases were not included in this auto census, so the results are proof of what cars and trucks were the most popular in the hearts and wallets of the U.S. public for 2022. The following is a list of the most popular cars and trucks in every state (and territory) in the United States. Read on to see what your state drives the most...

Read more
F1 Las Vegas: Here’s how much it all costs, and what you get, starting at $500
F1 Las Vegas may cost you $500 - or it might cost you $15,000
F1 Las Vegas Grand Prix

F1 Las Vegas Grand Prix Nate Swanner / DTMG

This week, F1 descends on Las Vegas for the first-ever Las Vegas Grand Prix, a race encompassing a large swathe of the famous Las Vegas Strip with four turns around the new, iconic MGM Sphere. The vent promises to be absolutely incredible; the backdrop of Las Vegas alone is reason to be here - but how much will it cost you?

Read more