Spectre's 1-1/2 Inch Carburetor Stud Kit features an integrated hex design for easy installation and a universal fit. Constructed using high quality materials, these carburetor studs come with a black oxide conversion coating on the studs and a gold Iridite finish on the nuts, ensuring they look as good as they perform. Spectre s 1-1/2 Inch Carburetor Stud Kit features an integrated hex design for easy installation and a universal fit. These carburetor studs come with a black oxide conversion coating on the studs and a gold Iridite finish on the nuts.