I took a pair of hood hinges that I had been using on my Challenger to media blast them for paint. I noticed that one had teeth and a gear while the other one had a couple of half moon circles instead of a gear. The teeth were kind of chewed up and sloppy. After pulling the springs on both styles I realized that the other one was nice and tight and so I have decided to use that style on my Challenger but are those kind correct for my year Challenger? I have plenty to choose from so I can use both but the non tooth style seems superior to me.