Want to change your OEM seat to an aftermarket seat? Need more leg room? This seat base adapter allows aftermarket seats to adapt to the existing OEM drill pattern in the floor - no additional drilling required. The seat base adapter also allows up to 7-1/2" of adjustment in 1" increments, providing extra leg room for tall drivers. Adapts to nearly every aftermarket seat. Chrome plated billet aluminum. Stainless steel hardware included.  

10" wide, designed to fit Kenworth W900 models with National Seating Series 2000 Ultra Ride.