Original style 1967 Corvette 327/300hp Corvette valve cover mount bolts. Correct hex head with "TR" headmarks. 1/4"-20 X9/16", grade 2 bolt. 8 piece car set.
Note: 1967 327/300 steel valve covers used bolt reinforcements to prevent covers becoming deformed. See Zip # MFB-88 for reinforcements to complete installation.