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For Use With Chevy Small Block; Hex Style Head Type; 3/8 Inch Diameter; 1.670 In

For Use With Chevy Big Block; Hex Style Head Type; 3/8 Inch Diameter; 1.670 Inch

For Use With Ford; Hex Style Head Type; 3/8 Inch Diameter; 1.670 Inch Overall Le

For Use With 4.6L/ 5.4L Ford Modular; Hex Nuts; Black Oxide; Chrome Moly

For Use With 4.6L/ 5.4L Ford Modular; 12 Point Nuts; Black Oxide; Chrome Moly

For Use With Chevy Small Block; Hex Style Head Type; 3/8 Inch Diameter; 1.670 In

For Use With Chevy Big Block; Hex Style Head Type; 3/8 Inch Diameter; 1.670 Inch

For Use With 340/ 360 Cubic Inch Chrysler/ KB Hemi; Hex Style Head Type; 3/8 Inc

For Use With BBK Long Tube Headers And Short Tube Headers; Hex Style Head Type; M12-1.175 Inch Thread Size; Black Oxide Finish; Steel; Set of 4

For Use With AMC 290-401/ Chevy Small Block 262-400/ Chrysler 383-440/ Pontiac 326-455/ Oldsmobile 330-455; Hex Style Head Type; 3/8 Inch - 16 Thread Size; Black Oxide; Steel; Set of 12 Nuts/ Studs