This New Generation Hex Drive Valve Seat Stone Holder by Goodson is designed to work with your .437" Pilot and features 13/16" x 13 threads. Built to Goodson's exacting standards and includes high quality bearings for better operation and longer life.
- Ball bearing stone holder
- Ideal replacements for worn holders
- For use with .437 top size valve guide pilots
- 13/16" x 13 thread
- For use with KW-series seat grinding stones



