The Peterbilt Ultracab XL 6 Inch Standard Conversion Kit With Window is a practical and efficient solution for upgrading your Peterbilt Ultracab XL. This kit includes a pre-assembled fiberglass panel with a window, providing a 6-inch cab extender for added space and comfort. The panel is CNC cut and drilled for a precise fit, and it comes with pre-installed sound deadening core and OEM upholstery. With a class A gel coat finish and a diamond plate tool tray, this kit is a perfect fit for most Peterbilt Ultracab XL models. Upgrade your truck with this high-quality conversion kit for enhanced functionality and style.