P-312KX | .437" Top Expanding Pilots

.437" Top Expanding valve guide pilots have a range of up to .020" from smallest to largest dimensions. They come complete with collet and expander (replacement parts available). Specifications: Top: .437" Size: .312" (7.92mm) Range: .309" to .329" OAL: 7.500" NOTE: Do not use expanding pilots with multi-angle valve seat cutting systems such as the Goodson 3-D Fast Cut™. They can be used for valve seat grinding.