Refreshing trim on your Peterbilt 378 and 379 cab can be easier with 4-inch cab and cowl panels that include light cutout options, giving you a clean, polished exterior and ready-made openings for marker or accent lights. These stainless-steel panels are chrome-plated, sold in driver and passenger pairs, and include a warranty against defects in workmanship and materials from the date of purchase, offering a robust aftermarket solution made in the USA. You can choose from several patterns of light cutouts-such as universal, slotted, round, or elite configurations-to match your lighting plan and simplify installation without drilling additional holes. Because they ship directly from the manufacturer, they may arrive separately from other items in your order, so plan accordingly. Before buying, check compatibility with your specific Peterbilt 379 (1987-2007) or 378 (1988-2007) model year to ensure proper fit and alignment. Replacing or customizing these cab and cowl panels can help maintain your truck's appearance while supporting improved lighting integration.