Ford Racing bronze valve guide kit, a four-piece set sized for 11/32" valve stems. These guides are intended for service replacement where bronze guides are required to support valve stems and retain proper alignment. Specifications include a .557" outside diameter, inside diameter matched to 11/32" valves, a 2.050" length, and the listing notes that honing is required. The product is described as Made in the USA in the source.
Ford Racing Bronze Valve Guide Kit