Mr Gasket - 4377 - Fits 1965-1997 Chevrolet 396-454 Big Block & 1997-2008 LS Based Engines

Big Block Chevrolet tubular head dowel, .638/.639 inch o.d. (outer diameter) by 1/2 inch. Packaged two per set. These hard to find dowel pins are precision machined then case hardened for accurate alignment in engine assembly.