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. Billet aluminum with gloss black powder coat finish. Stainless steel hardware included. Made in the USA.  

8" wide, designed to fit Kenworth W900 with OEM, National or Knoedler seat.