.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.