If you want to adapt an aftermarket seat in your Kenworth without drilling new holes in the floor, the 14-inch Billet Aluminum Seat Base Adapter for National Lo Profile Seats is a top solution. Made from strong billet aluminum with choices of natural, red baron, gloss black, post office blue or chrome finishes, this adapter plate spans 14 inches and fits the National low profile seat base while matching both metric and standard Kenworth floor mount patterns. It's designed for models such as the Kenworth T600, T800 and W900 series and helps provide additional legroom and secure mounting when switching from an OEM seat to an aftermarket National Lo Profile seat. Each adapter is sold individually and backed by a warranty against defects in workmanship and materials from the date of purchase. Because this is a high-quality aftermarket (not OEM) part, confirming your truck's seat configuration before ordering helps ensure proper fit and simplifies installation.