Granturismo Cylinder head nuts (long stud type)

These specially crafted nuts are designed to be the correct length for the cylinder cowl to sit correctly on the shorter GT cylinders and they also have a recess inside the bottom of them, this recess is handy mainly for GT186 and GT200 kits due to these cylinders being shorter than a standard cylinder which can result in the cylinder studs threads not being deep enough to enable standard nuts to travel far enough down the stud to actually torque the head down tight, depending which studs are used.