No need to double nut to install manifold studs anymore. This handy little tool quickly mounts onto M8x1.25 studs and speeds up the time it takes to tighten and torque down.
Engine Cylinder Head Stud Removal Tool
BD Diesel Stud Install Tool M8 x 1.25
STUD INSTALL TOOL M8 X 1.25
Stud Install Tool M8x1.25
Stud Install Tool;
Stud Removing Tool
Stud Install Tool