FACTORY PART
555645 Valve Guide Bushing
This price is for one valve guide.
This valve guide is about .002" bigger outside diameter than the factory valve guide. If you have a guide that has moved (it's loose) its oversize, so it doesn't move again. It is also .002" smaller inside diameter so that you can ream and hone it to fit the valve stem with the clearance you desire. The valve will not fit in the guide without reaming the ID.
If you want a valve guide that is the same size as the one you are removing the part number is 557118.
*for reference, please refer to Racing Performance Catalog & Reference Guide on the Briggs & Stratton website