67-72 C-10 20" Composite Inner Fenders67 72 20" C10 Composite inner fenders. We've teamed up with the best in the composites industry to offer a direct replica of our popular steel inner fenders. Now available in cost effective fiberglass or stylish and super light carbon fiber. Fiberglass come in gloss black gelcoat and carbon fiber are available in gloss finish only. Inner fenders are designed to work on trucks with bolt in aftermarket cross members or on aftermarket chassis' that are