Peterbilt flat top extended cab complete conversion kit. Perfect for day jobs! Turn your Flat Top Peterbilt into a day cab. Designed for Uni-Bilt models. This fiberglass cab extension comes complete with a fully welded aluminum sub structure. Easy to install with no modifications to the factory cab and can be pre painted. Fits 357, 378, 379, 386, 388 and 389 models. Includes: 3-Piece 6" cab extension Bonded 1" X 2" aluminum bracing Fiberglass interior window trim 19" x 36" factory rear window glass Window seal & lockbead Mounting hardware 2-Piece full wrap vinyl interior panel (choose black, tan, light and dark gray vinyl) *Due to the nature of the multi-piece mold, flashing at the seams will be evident. These areas willrequire sanding, light glazing and spot priming prior to paint. *Kits do not come with any type of air ride or suspentions mounting **Due to the size of the product this will be shipped via truck. Expedited shipping is not available on this item **