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

A Master Technician and nationally known trainer joins the Shop Press family. Say hello to Pete Meier!
Female metric square drive plugs were new to me. They might be to you, too.
Each line item confirms it—cheating doesn’t pay.
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.
A set of tires is expensive. Make it special.
Lubricant? More like lubri-can. A very cheap staple of most shops, I’ve learned to use it in a few unconventional ways.
Failing to perform these two vital service steps could cost time and money—or worse.
Any of these mistakes can lead to an unwanted oil leak or worse—a blown engine.
If your parking brake is weak or not working at all, a stretched cable is usually the issue.
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.
The right tools will expand your capabilities and help you to tackle more advanced jobs, but it’s not always easy to know where to start.
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.
PTFE tape is essential for threaded connections that need a good seal.
Especially for your mechanically-inclined clientele, sometimes a fingerful of clean grease is a lifesaver.
A fellow YouTuber recommended it. Why not give it a try?
Two solutions for yellowed, hazy headlights.