Which of the following is the most critical result of a rust hole in an exhaust system?

Using a lubricant when installing spark plugs was once common practice, but today, you might want to think twice before adding anything to your spark plug threads.
Company makes $44 million investment to expand plant.
The habits you form first can be the hardest ones to break.
Shop Press is the news and idea hub for everything related to working on cars and trucks, focusing on repair, technology, and wrenching lifestyle. With interesting stories from around the world, features on creative people and solutions, and all kinds of other stuff that’ll make you use your mind and your hands.
Auto care news and advice you can use.
Want to make your vehicle last? Not sure how to talk to a shop about car repairs? Nick and Lemmy offer their five top recommendations.
It’s your job to tell customers about warning signs and bad repairs.
From the factory with the spare’s valve stem pointing up, but you can flip it over and reinstall for easy checks and refills.
A textbook yields a few pearls of wisdom for those in the automotive biz.
Four reasons to buy a ½” breaker bar adapter.
Are you a wrench and a writer? A counterperson and a communicator? A service writer and a scribe? Get paid to share your experience and expertise with thousands of Shop Press readers.
Auto care news and advice you can use.
It’s much more than just Christine.
Saving time and labor while giving PPI customers a clear picture.
If you have tools that use 9 volt batteries, it’s cheap and easy to convert them to rechargeable batteries. Watch to learn how it’s done!
How to test for blown fuses in a car or truck | Fast and easy method
A local automotive event is the cure for whatever car doldrums you’re in.
As new cars and trucks, especially EVs, get heavier than ever, it’s important to check your lift’s rating and condition.
One basic vehicle checkover has several lessons to teach.
As dashboard cameras become more common, repair professionals should know how to deal with them.