Chevrolet

Small block

2.470" inch

7/16-20

5/8

134-2501

Small block

2.470" inch

7/16-20

13/16

234-2501

Small block

2.470" inch

7/16-20

1-1/16

234-2502

Gen III/IV LS Series small block (except LS7)

4.325" inch

M16x2

1-1/16

234-2503

Gen IV 7.0L (LS7) & GEN V 6.2L (LT1) small block

5.185" inch

M16x2

1-1/16

234-2504

Big block

1.550" inch

1/2-20

5/8

135-2501

Big block

1.550" inch

1/2-20

13/16

235-2501

Big block

1.550" inch

1/2-20

1-1/16

235-2502