Feuling Exhaust Stud Kit 3039Top engine builders demand quality fasteners! Secure your engine with complete confidence Quality 12 point heat treated stainless steel Feature precision rolled threads for optimum engagement, to prevent galling and promote more consistent torque loading Wide underhead flange design provides even load distribution for optimum sealing of surfaces, preventing leaks Tensile strength rated @ 170,000 psi; superior and stronger than OEM and stronger than