The Aeroflow Performance turbo studs are made for mounting turbochargers to manifolds, mounting exhaust systems and exhaust manifolds. These studs can fail during removal and reinstallation due to the extreme heat and stress. Manufactured from steel with copper locking nuts to provide a constant clamp load
 
Turbo Stud and Nut Kit.
Turbo Studs and Nuts, 5 Studs & 5 Nuts in M8 x 1.25mm.
Stud Dimensions:
Overall Length = 35mm
Under Head length = 8mm
Above Shoulder length = 23mm
Shoulder Length = 4mm