This valve seat cutter allows you to enlarge the cylinder head spring pocket to 1.320" outer diameter while reducing the outer diameter of the valve guide to .630". Ideal for installing larger...
Precision machined from chromemoly steel then black oxided, this 7 degree retainer is designed specifically for 26113/26125 Beehive springs on GM 6.6L Duramax applications.CatalogUser 1This Part F