P-312NXL | .375" Top Extended-Length Expanding Pilots

These .375" 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: .375" Size: .312" (7.9mm) Range: .309" to .329" OAL: 7.750" NOTE: Do NOT use expanding pilots with multi-angle valve seat cutting systems such as Goodson 3-D Fast Cut™. They can, however, be used for valve seat grinding.