Really?? I have been working on cars for 60 years, and I have never heard a front fender called a quarter panel. I had always thought that fenders were bolted on and that quarter panels were welded on. I am NOT questioning your knowledge, but I just Googled "What is the difference between a fender and a quarter panel"? Every single answer that popped up said some combination of "Fenders are in the front and quarter panels are in the rear" or "Fenders bolt on and quarter panels are welded on." Nowhere did I see anything that said a front fender is also considered to be a quarter panel.